Collision regulations (RIPA)

RIPA is 10 of the 45 PER questions, with at most 5 mistakes allowed. Six mistakes fail the exam even if everything else is perfect.

Practise this unit Print

Who keeps clear

Rule 13, overtaking: the overtaking vessel keeps clear, whatever its type. You are overtaking if you come from more than 22.5 degrees abaft the other vessel’s beam.

Rule 14, head-on: two power-driven vessels meeting bow to bow both alter to starboard.

Rule 15, crossing: the vessel with the other on its starboard side keeps clear, and avoids crossing ahead.

Rule 12, sail: with wind on different sides, the vessel with wind to port keeps clear (12(a)(i)). With wind on the same side, the windward vessel keeps clear (12(a)(ii)). If on port tack and unsure of a windward sail’s tack, keep clear (12(a)(iii)). Windward is the side opposite the mainsail (12(b)).

Rule 18, hierarchy: power keeps clear of sail; sail of fishing; fishing of vessels not under command or restricted. Rules 9, 10 and 13 come first.

Lights

Arcs (Rule 21): masthead 225°, sidelights 112.5°, stern 135°, all-round 360°. Green to starboard, red to port.

Two reds, not under command. Red-white-red, restricted. Three reds, constrained by draught. Green over white, trawling. Red over white, other fishing. White over red, pilot.

Shapes and signals

By day: two balls, not under command; ball-diamond-ball, restricted; cylinder, draught; one ball, anchored; three balls, aground; cone apex down, sail with engine.

Short blast, one second. Prolonged, four to six. One short, altering to starboard. Two, to port. Three, going astern. Five or more, doubt.

Activities

• Right of wayTwo vessels converge. Who keeps clear, and how?
• Lights and shapesAt night you only see lights. What vessel is it?
• Sound signalsListen to the blasts and say what they mean.

Questions in this unit

• Under power at night we see on our starboard bow a vessel showing a white (masthead) light and a red (side) light. If she closes with no appreciable change of bearing:
• How should a traffic separation scheme be crossed?
• Two power-driven vessels in sight of each other approach on opposite courses with risk of collision. Which must manoeuvre?
• Sailing in fog, must we show navigation lights?
• When the give-way vessel manoeuvres to avoid collision:
• Which statement about action to avoid collision is correct?
• Navigating in RESTRICTED VISIBILITY:
• The day shape a vessel at anchor must show is:
• The action the give-way vessel takes to avoid collision:
• In a traffic separation scheme, joining a traffic lane from one of its sides:
• Under Rule 10, vessels using a traffic separation scheme shall, as far as practicable, avoid:
• Under Rule 16, action by give-way vessel, every vessel directed to keep out of the way of another:
• Under Rule 3, a vessel with no way on but not anchored, made fast to the shore or aground is considered, under the collision rules:
• Under Rule 24, what is the masthead light difference between a composite unit (pusher rigidly connected) and a vessel towing alongside, both under 50 metres?
• Under Rule 18, if a sailing vessel, a fishing vessel, a WIG craft taking off and a seaplane on the water meet at sea, which generally has priority to keep her course?
• Sailing a 20-metre yacht, you will pass an area with a traffic separation scheme. Under Rule 10, what is the right way?
• Near the coast by day in good visibility, we see through binoculars a merchant ship with a cylinder hoisted. Under Rule 28 she is:
• Two power-driven boats cross with risk of collision. Boat “A” sees “B” on her starboard side. Under Rule 15, in general:
• Under Rule 33, sound signal equipment, a 20-metre vessel must carry:
• Rule 5, lookout, requires all vessels to keep at all times a proper lookout by sight and hearing and all available means appropriate to the circumstances, to make a full appraisal of the situation and risk of collision. This rule applies:
• Under Rule 19, conduct of vessels in restricted visibility, mark the CORRECT statement:
• Under Rule 21, definitions, the “towing light” is:
• Under Annex IV, distress signals, which signal could we use to help identification from the air?
• Under Rule 35, in or near restricted visibility, what is identified by four short blasts?
• Under Rule 3, general definitions, “length” means:
• Under Rule 34, approaching a bend where the view is obstructed and you cannot see other vessels, you sound:
• Under Rule 25, if a rowing boat does not show the lights prescribed for sailing vessels, she must have ready for immediate use a torch or lit lantern showing:
• Rule 3, general definitions, defines “vessel not under command” as:
• Under Annex IV, distress signals, how can we indicate distress and need of help?
• Under Rule 23, what lights must a 15-metre motor boat show under way at night?
• Under Rule 9, narrow channels, approaching a bend where the view is obstructed and other vessels cannot be seen, we must:
• Under Rule 3, the word “vessel” includes:
• A 21-metre pilot boat transits under her own power to another port for maintenance, partly at night, with no pilotage duty on the way. Under Rule 29 she shows:
• Under Rule 34, at night in a motor boat in sight of another vessel, to indicate we are altering to starboard we must use:
• Under Rule 5, lookout, when sailing single-handed:
• By day in good visibility, our 22-metre boat suffers a steering failure and cannot manoeuvre under her own means. Under Rule 27 we must:
• Under Rule 12, sailing vessels, the windward side of a sailing vessel can be defined as:
• Under Rule 9, narrow channels, sailing a 6-metre sailing boat in a narrow channel we must:
• Under Rule 3, the term “under way” applies to:
• Under Rule 18, which vessels are NOT required, if circumstances allow, to avoid impeding the safe passage of a vessel constrained by her draught?
• Under Rules 32 and 34, on our motor boat, to show another vessel in sight that we are going astern, what sound signal do we give?
• Under Rule 31, could a WIG craft flying near the sea surface not show exactly the lights of Rule 23 and still comply?
• Under Rule 36, signals to attract attention, if a vessel wants to attract our attention:
• In a motor boat we are crossing with a sailing boat on our starboard side that shows a cone point down. Under Rule 8, we must:
• Under Rule 36, to attract another vessel’s attention we may:
• At night near the coast we see only two red lights above one white light in the same vertical line. Under Rule 30 it is:
• Under Rule 21, definitions, a “flashing light” flashes:
• Under Rules 32 and 35, what sound signal must a power-driven vessel making way give in restricted visibility?
• Under Rule 17, action by stand-on vessel, mark the CORRECT statement.
• Under Rule 20, application of Part C, on the light rules, mark the CORRECT statement.
• Under the rules, draught in relation to available depth is a deciding factor in setting:
• Under Rule 24, what lights must a vessel towed alongside show?
• If at night we anchor our 6-metre boat away from any narrow channel, fairway, anchorage or busy area, under Rule 30:
• Sailing near Tambo Island, a risk of collision develops with a boat engaged in fishing. Under Rule 8, we must:
• In fog we hear one prolonged blast at intervals of not more than 2 minutes and four short blasts. Under Rule 35, they indicate:
• If we see ahead a vessel’s two masthead lights in line and both her sidelights, we are in a:
• Under Rule 6, safe speed, in deciding safe speed account is taken that:
• Under Rule 23, if at night we see a white light, sidelights and a high-intensity flashing red light, it is:
• Under Annex IV, how can we signal distress or need of help with fog-signalling apparatus?
• Under Rule 23, when must an all-round flashing yellow light be shown?
• At night near Cabo Estai, we see ever closer ahead a white light and both sidelights of a power-driven vessel. What is the right manoeuvre?
• In a motor boat near Tabarca Island, a sailing vessel approaches from astern with risk of collision. Under Rule 13, what is the right manoeuvre?
• Under Rule 25, on which craft may sidelights and sternlight be replaced by a white torch ready for immediate use?
• Under Rule 12, if we see a sailing vessel to windward but cannot tell which side she has the wind, while we have the wind to port, we must:
• Sailing a 6-metre yacht in a narrow channel, we see a 100-metre container ship approaching head-on. Under Rule 9, in general we must:
• Under Rule 20, sailing before sunset, if heavy showers bring restricted visibility, the lights prescribed in Part C:
• Under Rule 10, a vessel restricted in her ability to manoeuvre, laying or picking up a submarine cable in a traffic separation scheme:
• Aboard a motor boat on course 359º, another boat steers the opposite course 179º with risk of collision. How is this head-on situation resolved?
• Under Rule 2, responsibility:
• At night entering port by a channel, we see ahead a boat showing sidelights and, high on the mast, a white light over a red one. It is:
• Under Rule 1, the collision rules apply to:
• Under Rule 26(b)(i), vessels trawling show:
• Under Rule 10, vessels engaged in maintaining safety of navigation in a traffic separation scheme are exempt from the rule:
• Under Rule 23, power-driven vessels show a second masthead light abaft and higher than the forward one. Vessels not obliged to, though they may, are those less than:
• Under Rule 35(g), a vessel giving three blasts in succession, short, long and short, indicates:
• Under Rule 33(b), which vessels may replace the whistle with other means of making efficient sound signals?
• Under Annex IV, in distress and needing help:
• Under Rule 3, a sailing vessel using her engine while trolling is considered:
• Under Rule 14, at night a head-on situation exists when a vessel sees another:
• Under Rule 2, in interpreting and complying with the rules, what is NOT taken into account?
• Under Annex IV, an SOS in Morse code by any signalling method may be used as a distress signal. It is:
• At night in the Ría de Vigo we see ahead, ever closer, only one white navigation light of a power-driven vessel. What is the right manoeuvre?
• Under Rule 12, when two sailing vessels approach with risk of collision, in general the one that gives way is the one that:
• Under Rule 9, which vessel shall NOT impede the passage of any other vessel navigating within a narrow channel?
• Under Rule 3, general definitions, unless stated otherwise:
• Under Rule 31, if a seaplane shows lights positioned as required but with characteristics very similar, not identical, to Part C, we understand that:
• Under Rule 21(b), on vessels under 20 metres the sidelights may:
• Under Rule 6, what does NOT determine safe speed?
• Under Rule 3, vessels restricted in their ability to manoeuvre include:
• Under Rule 17, when for any reason the stand-on vessel is so close that collision cannot be avoided by the give-way vessel alone, she:
• Under Rule 13(b), a vessel is overtaking another when she:
• Under Rule 35(a), in or near restricted visibility by day, a power-driven vessel making way sounds:
• Under Rule 32(a), the word “whistle” means any device:
• Under Rule 23(d)(iii), the masthead or all-round white light may be off the centreline, if it cannot be fitted on it and under certain conditions, on power-driven vessels under way:
• Under Rule 34, a light used to supplement the manoeuvring and warning whistle signals shall be visible at a minimum range of:
• Under Rule 24, a power-driven vessel towing shows two masthead lights in a vertical line instead of:
• Under Rule 24(b), when are a pushing vessel and a pushed vessel considered a composite unit?
• Under Rule 34, when must manoeuvring whistle signals be supplemented with light signals?
• Under Annex IV, to attract air search and rescue, it is recommended to use a piece of canvas coloured:
• Under Rule 26, vessels fishing other than trawling, with gear extending 140 metres, when making way show in addition to the prescribed lights:
• Under Annex IV, what colour is the dense smoke of a smoke signal indicating distress?
• RULE 30. Vessels at anchor shall show, where it can best be seen:
• The stand-on vessel:
• A trawler will show as its characteristic lights:
• An anchored vessel over 50 metres long will show at night:
• Sailing at night, we see a white light and, somewhat lower, a red light on one side of it and a green light on the other. What type of vessel is it?
• Rule 34. When a power-driven vessel under way gives "two short blasts", what is it indicating?
• A power-driven vessel constrained by her draught may show a shape consisting of:
• When the bearing of an approaching vessel does not change appreciably:
• A sailing vessel is overtaking a power-driven vessel in sight. Which must keep out of the way of the other?
• Two power-driven vessels in sight cross with risk of collision:
• The shape that identifies a vessel at anchor is:
• A vessel approaches ours from a relative bearing of 120º. The situation is:
• If approaching a bend we hear one prolonged blast, under Rule 34 we must:
• In a narrow channel with vessels in sight, what signal does the vessel about to be overtaken give to agree?
• Under way, if the bearing of another vessel does not change...
• By day, from our motor boat we see to port a vessel with three shapes in a vertical line: ball, diamond, ball. With risk of collision we must...
• At night we want to show another vessel in sight that we are turning to starboard. What signal do we make?
• When must a hovercraft show the all-round flashing yellow light?
• If we see only two red lights in a vertical line and one white light, what vessel is it?
• A towed object under 100 metres long and 25 wide, hard to see and partly submerged, shows at night:
• What do two short blasts in succession mean (when vessels are in sight)?
• Five or more short, rapid blasts or flashes mean:
• A trawler, besides other lights, shows two lights vertically:
• At night, how can we supplement manoeuvring and warning whistle signals?
• A vessel in distress uses or shows the signals in the rules. Which one is NOT in them?
• If governments apply special rules for extra lights, signals or shapes for fishing fleets, they must be:
• Can a sailing vessel be considered a power-driven vessel?
• Under Rule 25, what is the day shape of a vessel under sail also using her engine?
• Under Rule 25, what lights must a sailing vessel over 7 metres show under way?
• Under Rule 19, a vessel that cannot avoid a close-quarters situation with another vessel forward of her beam, with risk of collision, must:
• Rule 3 defines a vessel constrained by her draught as:
• Vessels using a traffic separation scheme shall:
• A power-driven vessel sees a sailing vessel at 115º relative bearing to starboard approaching with risk of collision. If collision is not imminent, how should she act?
• In a traffic area, a power-driven vessel will turn to port to keep clear of another in sight. What sound signal must she give?
• In a traffic separation scheme, when may a power-driven vessel use the adjacent inshore traffic zone?
• Under power in the proper lane of a traffic separation scheme, we see to starboard a power-driven vessel crossing at right angles, creating a crossing situation with risk. In this case:
• A vessel sounds five short, rapid blasts; she indicates that:
• A power-driven vessel between 12 m and 50 m shows:
• In a traffic separation scheme, may a vessel enter a separation zone?
• In restricted visibility we detect only by radar a vessel closing with risk of collision from 155º relative bearing to starboard. In this case:
• When may the stand-on vessel act to avoid collision by her own manoeuvre?
• A sailing vessel carries forward a cone point down. She is showing that:
• An 11-metre leisure boat is at anchor by day. Must she show a black ball forward?
• Under what circumstances may a narrow channel be crossed?
• What lights do sailing vessels under 20 metres show?
• Power-driven vessel ISLA sees two lights in a vertical line, red over green, and lower down a single green light not aligned with them. The vessel approaches on a steady bearing of 045º to port. ISLA:
• A power-driven vessel gives two short blasts. She is indicating that:
• Restricted visibility. Unless we have confirmed there is no risk of collision, what must we do if we hear another vessel’s fog signal roughly on the port bow?
• Under Rule 16, if we must keep out of another vessel’s way, how should we act as far as possible?
• Under Rule 9, which vessels shall not impede vessels that can safely navigate only within a narrow channel?
• Under Rule 13, any vessel overtaking another:
• At night we see ahead a vessel showing, where best seen, 3 red lights in a vertical line. Under Rule 28 she is:
• Under Rule 3, “sailing vessel” means any vessel under sail:
• Under Rule 32, “prolonged blast” means:
• Under Rule 33, a 22-metre vessel will be fitted with:
• Under Rule 19, a vessel detecting another by radar alone, with risk of collision developing, shall act in good time; if altering course, she shall as far as possible avoid:
• Under Rule 10, when may a 25-metre power-driven vessel use the inshore traffic zone?
• Under Rule 10, a 15-metre power-driven vessel:
• Under Rule 23, which lights are strictly compulsory under way on a 15-metre power-driven boat?
• Under Rule 24, what lights does a towed vessel show if clearly visible and not partly submerged?
• Under Rule 34(e), vessels nearing a bend or area of a channel where the view is obstructed shall sound:
• Under Rule 6, what is NOT taken into account in deciding safe speed?
• Under Rule 27(b), which vessel shows three all-round lights in a vertical line, red, white and red?
• Under Rule 10, vessels not using a traffic separation scheme:
• Under Rule 3, can a “sailing vessel” be considered a “power-driven vessel”?
• Under way, we see on our starboard side, forward of the beam, a vessel bearing 030º. Twenty minutes later the bearing has hardly changed, at 030.5º. Under Rule 7, what must we consider?
• Approaching, we see one vessel towing another. Under Rule 27, we should consider that:
• Under Rule 34(b), when light signals supplement a power vessel’s manoeuvring blasts, which light is used?
• Under Rule 23(c), the high-intensity all-round flashing red light shall be shown:
• Under Rule 19, conduct in restricted visibility:
• In an overtaking situation, the overtaking vessel shall manoeuvre…
• When there is risk of collision between two power-driven boats, who must manoeuvre?
• At night we see two red lights in a vertical line, a green and a red. It is:
• Under sail we see on our starboard side a merchant ship closing with risk of collision:
• Under Rule 13:
• A sailing vessel also using her engine for propulsion is considered…
• A vessel under 50 metres at anchor may show, instead of Rule 30(a):
• When two power-driven vessels cross with risk of collision, the one to give way is…
• Which light shows over an arc of the horizon of 225º, towards the bow?
• A vessel not normally engaged in towing need not show Rule 24 lights:
• The rules apply the term “restricted visibility”:
• Which vessel must manoeuvre when a sailing vessel and a vessel engaged in fishing cross?
• When a pushing and a pushed vessel are rigidly connected as a composite unit, they are regarded as:
• The day shape a vessel engaged in fishing must show is:
• In or near restricted visibility, day or night, we hear a bell rung rapidly for about five seconds at intervals of not more than a minute. It is…
• In restricted visibility, a vessel constrained by her draught must sound:
• Under the rules, a power-driven vessel is:
• In good visibility, sailing yacht “A” is overtaking power-driven “B”. Who must manoeuvre?
• A sailing vessel at night may show:
• What day shape must power-driven vessels under way show?
• When a power-driven vessel under way gives “two short blasts” to show her manoeuvre, it means:
• An all-round flashing yellow light is carried by:
• Under the rules, course and/or speed changes to avoid collision shall be:
• At night, if we see ahead another vessel’s masthead light and sidelights, it is a situation of:
• Rule 27. Two red lights in a vertical line are characteristic of…
• Rule 10. Mark the correct answer.
• Rule 13. When a vessel is in doubt whether she is overtaking another…
• Rule 27. A vessel not under command making way, besides the two all-round red lights, shows:
• Rule 28. A power-driven vessel constrained by her draught may show where best seen…
• Rule 30. Vessels at anchor shall show where best seen…
• Rule 4. The steering and sailing rules apply:
• Rule 24. A yellow light is carried by:
• Rule 25. A sailing vessel over 7 metres under way must show:
• Rule 34. What signal do we give to show we are turning to port, in sight of other vessels?
• Under Rule 33(a), which vessels must carry a bell as well as a whistle?
• Under Rule 10, vessels under 20 metres shall not impede the safe passage of:
• Under Rule 6, with a working radar, in deciding safe speed account is taken that:
• Under Rule 10(c), if we must cross a traffic lane in a scheme, we do so:
• Can we be sure that merely complying with the rules exempts us from liability in a collision?
• When are the signals in Annex IV of the collision rules used?
• Who may use the inshore traffic zone next to a traffic separation scheme instead of the lane?
• Under Rule 24(g), a towed vessel or object, hard to see and partly submerged, 25 metres or more wide, shows:
• When navigating along a narrow channel, if safe, how must it be done under Rule 9(a)?
• Under way at nightfall, the crew want to rest. We stop the engine, light a light to warn of our presence and all take a nap. Is this correct?
• Rowing boats may show:
• A sailing vessel under way in restricted visibility sounds:
• A 10-metre power-driven vessel shows:
• A lookout on vessels shall be kept:
• Under power at night, we see on our port bow a vessel closing on a steady bearing. She shows only a green light. In this case:
• A power-driven vessel sees a sailing vessel on her port beam, closing with risk of collision in a crossing. In this case:
• Two all-round red lights in a vertical line indicate:
• Sailing without radar in restricted visibility, we hear the fog signal of an unknown vessel. If it seems to come from the port bow, what do we do?
• Two sailing vessels cross with risk of collision. Both in sight and with the wind on the same side, which must keep clear?
• When two sailing vessels cross with risk of collision:
• Two power-driven vessels in sight meet on reciprocal or nearly reciprocal courses with risk of collision. In this case:
• A power-driven vessel sees on her starboard bow the masthead lights and red sidelight of a vessel closing with risk of collision. In this case:
• What is the white light placed as near as possible to the stern, showing an unbroken arc of 135 degrees, 67.5 degrees from right aft to each side?
• When must a sailing vessel keep out of the way of a power-driven vessel?
• Two sailing vessels approach with risk of collision. If they have the wind on opposite sides:
• Whenever possible, in a narrow channel we should sail:
• We sight a vessel at 110º relative bearing to port, closing without the bearing changing appreciably. We are in a situation of:
• A merchant ship and a leisure boat, both power-driven and in sight, cross in open sea with risk of collision. Which keeps clear?
• As far as possible, a vessel engaged in fishing under way shall keep out of the way of:
• When two sailing vessels risk collision, the one keeping out of the way of the other is:
• A vessel aground will show by day:
• How should a sailing vessel act on sighting a power-driven vessel on her starboard side with risk of collision:
• We sight a dredger causing an obstruction. We pass:
• To determine safe speed, all vessels shall take into account, among other factors:
• A vessel is deemed to be overtaking another:
• Under Rule 6 of the RIPA, to determine safe speed the following shall be taken into account, among others...
• In a head-on situation, if there is any doubt whether it exists:
• A vessel counts as a sailing vessel when:
• Rule 8. In any action taken to avoid collision...
• The length of a prolonged blast is:
• RULE 10. Indicate which answer is NOT correct. "Vessels using a traffic separation scheme shall..."
• A vessel is in doubt whether she is overtaking another. How should she act?
• In restricted visibility we hear on our port side groups of two prolonged blasts about two seconds apart, repeated at most every two minutes. It is:
• A vessel shows two all-round lights, red over white, and lower down a white light. Which vessel is it?
• Under power at night we see to starboard, at 103º relative bearing, the two masthead lights and red sidelight of a vessel closing with risk of collision. We are in:
• Two sailing vessels in sight meet on reciprocal or nearly reciprocal courses with the wind on opposite sides. In this case:
• A vessel under 7 metres engaged in diving operations:
• The day shape identifying a trawler is:
• The expression “vessel engaged in fishing” applies to:
• Under power at night we see ahead both sidelights of an approaching vessel, with no other light. In this case:
• Under Rule 19, except where it has been determined there is no risk of collision, every vessel hearing apparently forward of her beam another’s fog signal:
• Under Rule 18, vessels engaged in fishing under way shall keep out of the way of:
• Under Rule 15, when two power-driven vessels cross with risk of collision:
• Near the coast at night in good visibility, we see through binoculars a ship showing: a white light forward, another lower white light aft, and two red lights in a vertical line high on the mast. Under Rule 30 she is:
• Under Rule 3, “vessels in sight of one another” applies:
• Under Rule 6, what is NOT taken into account for safe speed?
• Under Rule 34(a), what whistle signal does a power vessel in sight of another give to show she is going astern?
• Under Rule 34(c), when two vessels in sight in a narrow channel and one gives two prolonged blasts followed by one short, the sender:
• Under Rule 17, when one of two vessels must keep out of the other’s way, the other:
• Under Rules 1 and 3, the rules never apply to:
• Under Rule 18, WIG craft operating on the water surface follow the steering and sailing rules:
• Under Rule 21, the “masthead light” is a light:
• Under Rule 36, any light used to attract another vessel’s attention shall be:
• Under Annex IV, which International Code signal indicates distress?
• Under Rules 23(d)(ii) and 30(b), if we see only one all-round white light, which interpretation is INCORRECT?
• Under Rule 10, how should a sailing vessel transit a traffic separation scheme with plenty of power-driven traffic?
• Under Rule 24, if on a hard-to-see, partly submerged towed vessel we see a diamond shape at the after end and another near the forward end, it means:
• Under Annex IV, what signal could we use to indicate distress and need of help?
• Under Rule 34(b)(iii), the light used to supplement manoeuvring whistle signals among power vessels in sight shall be:
• Under Rule 23, power vessels under 12 metres under way may show, instead of the normal power-vessel lights:
• Under Rule 9, vessels nearing a narrow channel where obstructed view hides other vessels:
• Under Rule 29, pilot vessels on duty under way, besides white-over-red at the masthead, show:
• Under Rule 30, vessels at anchor show forward:
• If we see a fishing vessel, with no other fishing vessels nearby, showing two all-round lights, green over white, it is:
• Under Rule 15, at night a crossing situation where we must keep clear exists when we see another vessel:
• Sailing in the Ría de Muros, another sailing vessel approaches with risk of collision. Both have the wind on the same side and she is to windward. How should you act?
• In a 5-metre power-driven boat with a top speed of 10 knots, instead of normal power-vessel lights we may show:
• At night near Punta de Sa Pedrera, we see ever closer astern a white light and both sidelights of a power vessel. How should we act?
• Under Rule 33(a), the bell or gong, or both, may be:
• Under Rule 24(a)(i), a power vessel towing shows three masthead lights in a vertical line forward:
• Under Rule 23, hovercraft in non-displacement mode show, besides power-vessel lights:
• Sailing at night mid-channel into Pasajes, we see ahead a vessel showing sidelights and, at the masthead, two lights in a vertical line, white over red. Under Rule 29, this is:
• Under Rule 8, an alteration of course alone:
• Under Rule 6, safe speed:
• Under Rule 21(b), sidelights each show an unbroken light:
• Under Rule 10, which vessels shall NOT use an inshore traffic zone of a traffic separation scheme?
• Under Rule 4, Rule 8 (action to avoid collision) applies:
• Under Rule 26, by day we see a vessel showing two cones points together in a vertical line and a cone point up. What vessel is it?
• Under Rules 12 and 17, what should a sailing vessel with the wind on the starboard side do on approaching, with risk of collision, a sailing vessel with the wind on the port side?
• Under Rule 18, sailing on the high seas, we shall keep out of the way of:
• Under Rule 2, Responsibility:
• Under Rule 10, if we must cross a traffic separation scheme, how?
• Rule 19, conduct in restricted visibility, applies to:
• Shortly after sunset we approach an anchorage where a vessel of 50 metres or more lies at anchor. Under Rule 30, we can tell because she shows:
• At night we see a vessel showing two lights in a vertical line, red over green, plus a green sidelight. Under Rule 25, it could be:
• Under Rule 7, risk of collision exists:
• Under Rule 14, what must two power-driven vessels meeting head-on do?
• Under Rule 33, aboard a 12-metre boat, what sound equipment must we carry?
• Under Rule 24, in heavy traffic we see a vessel showing a single diamond shape where best seen. It could be a vessel:
• Mark the INCORRECT statement. Under Rule 19, unless no risk of collision exists, a vessel that cannot avoid a close-quarters situation with a vessel forward of her beam:
• Sailing near the coast by day, we see through binoculars a vessel showing three balls in a vertical line. Under Rule 30, she is:
• Under Rule 25, a sailing vessel shows forward a cone point down when:
• In good visibility in a narrow channel, in a vessel that can only navigate safely inside it, a sailing vessel under 10 metres crosses and may impede us, and we doubt her intentions. Under Rules 9 and 34:
• Under Rule 24(a), a power vessel towing another and showing a diamond shape where best seen indicates that:
• Under Rule 17, mark the CORRECT statement.
• If a 40-metre vessel shows only an all-round white light forward and another aft, lower than the forward one, we understand that:
• In restricted visibility we hear one prolonged blast at intervals of not more than two minutes. Under Rule 35, it is:
• Under Rule 2:
• Under Rule 25(d)(ii), may a vessel under oars NOT show sailing-vessel lights if she has ready at hand a torch or lighted lantern showing a white light, shown in time to prevent collision?
• Rule 30 says a vessel at anchor shall show where best seen:
• Under Rule 20(d), the rules concerning shapes shall be complied with:
• Under Rule 20(e), the lights and shapes in these Rules:
• Under Annex IV, a square flag with a ball or similar above or below it means:
• Rule 6: several factors determine safe speed. Which of these is NOT one?
• Under Rule 10, vessels using a traffic separation scheme shall:
• Rule 10(h): vessels not using a traffic separation scheme shall avoid it by leaving:
• Under Rule 7, to decide whether risk of collision exists, among other things:
• Under Rule 9, within a narrow channel a power-driven vessel shall not impede the passage of a vessel engaged in fishing. True or false?
• Rule 3: the term “under way” applies to a vessel that is:
• Rule 14(b): a head-on situation is deemed to exist when a vessel sees the other:
• Rule 30: a vessel aground under 50 metres shows at night, besides an all-round white light forward:
• The word “seaplane” means:
• Rule 9(b): which vessels shall not impede the passage of a vessel that can safely navigate only within a narrow channel?
• Rule 34: three short blasts mean:
• The International Regulations for Preventing Collisions at Sea apply to:
• How must power-driven vessels meeting head-on act?
• How should lookout be kept on a sea watch?
• Under power, we see a merchant ship approaching on our starboard side with risk of collision:
• Power-driven vessels under way shall keep out of the way of:
• At night we see only three all-round lights in a vertical line, red, white, red. It is:
• How shall the give-way vessel manoeuvre?
• The rules on lights and shapes:
• At night we see a vessel showing three all-round red lights in a vertical line besides her usual navigation lights. It is:
• Which vessels carry two masthead lights?
• If by day we see a vessel with two black balls in a vertical line, it is:
• Rule 10: fishing vessels in traffic separation schemes:
• Rule 23: which vessels must carry two masthead lights?
• Rule 3: a trawler at work is considered by the Collision Regulations as:
• Rule 6: what do the Collision Regulations mean by “safe speed”?
• Rule 21: the masthead light shows over an arc of:
• Under Rule 3, the expression “under way” applies to a vessel that meets the condition of:
• Under Rule 27, a vessel showing two black balls in a vertical line indicates that she is:
• Under Rule 10, a vessel not using a traffic separation scheme shall avoid it by leaving:
• We see a signal giving off dense orange smoke. What does it mean?
• Rule 25: a vessel under sail and power together shall show forward:
• Rule 18: a power-driven vessel under way shall keep out of the way of:
• Rule 12: two sailing vessels with risk of collision and the wind on the same side:
• Under Rule 3(i), a vessel at anchor:
• Under the Collision Regulations definitions, what is a sailing vessel?
• Under Rule 27(e), a small vessel engaged in diving operations shall show where best seen:
• Under Rule 24(e), a visible vessel or object being towed that is not partly submerged shall show:
• The bearing of an approaching vessel does not change appreciably. In this case:
• A power-driven vessel under way does NOT keep out of the way of a sailing vessel:
• A vessel sounding five or more short and rapid blasts is indicating:
• A sailing vessel is overtaking another sailing vessel, both in sight. In this case:
• A power-driven vessel and a vessel engaged in fishing, in sight of one another, meet on opposite or nearly opposite courses with risk of collision. In this case:
• A power vessel sees on her port beam the green sidelight of an approaching vessel with risk of collision, showing no other lights. In this case:
• In the Regulations, a “sailing vessel” is:
• Under power at night, we see at relative bearing 050º starboard the red sidelight and masthead light of an approaching power vessel. If the bearing does not change appreciably:
• Two sailing vessels in sight are crossing with risk of collision. If both have the wind on the same side:
• A power-driven vessel and a sailing vessel, in sight, cross in open water with risk of collision. In this situation:
• In open water we sight a vessel approaching from relative bearing 107º on our port side. What situation is it?
• A power vessel sights a sailing vessel approaching at relative bearing 130º starboard. In this situation:
• In a crossing with risk of collision between a power vessel and a sailing vessel, both in sight:
• In an overtaking situation between two sailing vessels:
• In restricted visibility, unless no risk of collision exists, a vessel hearing apparently forward of her beam another vessel’s fog signal:
• In a crossing with risk of collision between two power vessels in sight, the one with the other on her starboard side:
• A sailing vessel is overtaking a power vessel with risk of collision, both in sight in open water:
• Two sailing vessels in sight, with the wind on the same side, approach with risk of collision. Which must manoeuvre?
• Can risk of collision exist when the bearing of an approaching vessel changes appreciably?
• In open water a power vessel and a sailing vessel, in sight, meet on opposite or nearly opposite courses. In this situation:
• In open water a power vessel sees a sailing vessel approaching from 25º abaft her starboard beam. In this situation:
• In open water two sailing vessels in sight cross with risk of collision, both with the wind on the port side:
• Under Rule 18, without prejudice to other rules, sailing vessels under way keep out of the way of:
• What are the minimum lights required of a power-driven craft under 7 metres long, sailing at less than 7 knots?
• If while sailing we see a white light from a torch, it is:
• When must we switch on navigation lights?
• Sailing at night we see one white light ahead. It is:
• A vessel in sight close by sounds five short, rapid blasts. It is indicating that:
• A sailing vessel and a power-driven vessel in sight meet head-on with risk of collision:
• A vessel under sail shows forward a cone with its apex down. For the purposes of the Collision Regulations it is:
• Under power at night, we see a vessel approaching ahead, showing a green light and a red one to the right of it (no other lights visible). In this situation:
• When sailing in an area of restricted visibility:
• Rule 18. Sailing vessels under way shall keep out of the way of:
• Under Rule 16, a vessel required to keep out of another’s way shall, so far as possible:
• Under Rules 15 and 16, when two vessels cross with risk of collision, in general:
• Under Rule 18, on the high seas with a fishing vessel, a power vessel, a sailing vessel and a seaplane on the water, which in general holds her course?
• Under Rule 10, a 24-metre vessel:
• Under Rules 23 and 27, what lights does a 60-metre power vessel making way and restricted in her ability to manoeuvre (not minesweeping) show at night?
• Under Rule 10, may a vessel using a traffic separation scheme join a lane from one of its sides?
• Under Rule 12, a sailing vessel with the wind to port sees another sailing vessel to windward approaching with risk of collision and cannot tell on which side she has the wind. What should she do?
• Under Rule 20 (Part C, Lights and Shapes), mark the CORRECT statement.
• Under Rule 31, when a WIG craft cannot show lights of the characteristics and positions in Rule 23:
• Under Rule 34(d), when vessels in sight approach and one doubts the other’s intentions or action, the doubting vessel shall at once indicate it by at least:
• Under Rule 21, the towing light is a yellow light:
• Under Rule 33(a), what must a 24-metre vessel carry?
• Sailing by day, we see a vessel showing two balls in a vertical line where best seen. She is indicating that:
• A vessel proceeding under sail, when also being propelled by machinery, is obliged to show:
• What is meant by restricted in ability to manoeuvre?
• The length of whistle blasts, according to the Regulations (RIPA), is about...
• A trawler will show:
• A vessel proceeding along a narrow channel:
• Sailing without radar in reduced visibility, we hear a fog signal apparently from the starboard bow. If we have no prior knowledge of a vessel in that area, we must:
• Under power, we see a power-driven vessel approaching on our starboard beam, on a steady bearing. We must:
• Under power, we see a power-driven vessel approaching with risk of collision on our port bow. Once it is evident that the other vessel is not acting to keep out of our way:
• When manoeuvring to avoid a collision, you must:
• The shape identifying a vessel not under command is:
• If radar equipment is working properly, must it be used to get early warning of risk of collision?
• A vessel in a narrow channel is approaching a bend where the view is obstructed and other vessels cannot be seen. It must:
• A recreational boat is overtaking a merchant ship. Which one must keep out of the other’s way?
• Two sailing vessels approach each other with risk of collision, neither overtaking the other. Both have the wind on the same side. In this case, the one that keeps out of the way is:
• Under power at night, we see ahead both sidelights of a vessel and its masthead light. In this case:
• Vessels sailing in an area of reduced visibility:
• An 11-metre sailing vessel, under way at night at 9 knots, may show:
• If the circumstances of the case allow, a manoeuvre made to avoid a collision:
• We sight a vessel showing only one red light. It is:
• Under power, we sight ahead the sidelights of a vessel showing no other light. In this case we must:
• A vessel is heading for port along a narrow channel. Because of its size it can only navigate safely within that channel. Which vessels will not impede its passage?
• In a risk of collision, when are two vessels in a “crossing” situation?:
• The sternlight:
• Sailing in reduced visibility we detect on radar a vessel not in sight, staying at a relative bearing of 65º to port in a crossing situation with risk of collision. In these circumstances:
• Rowing boats (without an engine) may show:
• A vessel restricted in its ability to manoeuvre is:
• When can a risk of collision be considered a crossing?
• If two sailing vessels are in a risk of collision, which one will manoeuvre?
• Sailing purely under sail we sight dead ahead a boat with risk of collision, showing two white masthead lights and both sidelights. Who must manoeuvre?
• A boat intending to cross a traffic separation scheme will do so:
• In what sector are the sidelights visible?
• If at night we sight a boat with two lights in a vertical line, red over white, it is:
• If in reduced visibility we hear a signal of 1 short, 1 prolonged and 1 short blast, it is:
• If a vessel manoeuvring in normal visibility sounds 2 short blasts, it means:
• In the Collision Regulations, the speed that lets a vessel take proper and effective action to avoid collision and stop within a distance appropriate to the prevailing circumstances and conditions is:
• A “vessel engaged in fishing” is:
• A 20-metre sailing boat is at anchor. By day it must show:
• Which vessels never show a masthead light?:
• A 12-metre recreational boat must carry:
• What sound signalling equipment must an 11-metre sailing vessel carry?:
• In reduced visibility:
• A vessel lets off a smoke signal giving dense orange smoke. What does it mean?:
• In a narrow channel we approach a bend that cannot be fully seen because the land blocks the view. How should we act if we hear a prolonged blast?:
• When are vessels deemed to be in sight of one another?:
• Traffic separation schemes. Choose the correct statement:
• In a narrow channel:
• A recreational boat is fishing with a rod, drifting with its engine out of gear. It is:
• A vessel showing two black cones joined at their apexes in a vertical line, one above the other, is:
• A vessel nearby is sounding its whistle continuously. It is indicating that:
• When are you sailing in “reduced visibility”?:
• In a traffic separation scheme, vessels under 20 metres:
• In interpreting and complying with the International Regulations for Preventing Collisions, due regard shall be had to:
• Choose the correct option:
• Under Rule 24(a)(v) of the Regulations, when a power-driven vessel towing another shows a diamond shape where it can best be seen, it means that:
• Under Rule 2 of the Regulations, on liability for neglect in complying with the Regulations, it says that:
• Under Rule 8(c) of the Regulations, what manoeuvre may be the most effective to avoid a close-quarters situation, if there is enough sea room?
• By day we sight a vessel with 2 black balls in a vertical line.
• A vessel nears a bend in a channel where other vessels cannot be seen. It will sound:
• In restricted visibility, a sailing vessel detects by radar alone another vessel approaching on its starboard beam, with no appreciable change of bearing. In this case:
• In restricted visibility, unless it has been determined that no risk of collision exists, every vessel under way hearing, apparently forward of its beam, the fog signal of another vessel:
• A 20-metre yacht is under sail while also propelled by its engine. Under the collision regulations it counts as:
• A vessel in sight of another doubts whether the other is taking enough action to avoid collision. To show this doubt:
• A power-driven vessel sounds three short blasts. It means that:
• What arc of visibility does the stern light have?
• A vessel sounding five short rapid blasts is saying that:
• In restricted visibility we detect by radar alone a vessel on the port beam. If its bearing stays constant and range falls:
• When overtaking in open sea with vessels in sight of one another, when must the overtaking vessel keep clear of the overtaken?
• In a narrow channel we near a bend where the view is blocked. What sound signal do we make?
• A fishing vessel returns to port with no gear out. Under the collision regulations it counts as:
• In a head-on situation with risk of collision between two power-driven vessels in sight of one another:
• When two power-driven vessels in sight cross with risk of collision, which is the “stand-on vessel”?
• When is vessel A considered to be overtaking vessel B?
• Under power at night we see a green light on our port bow; we see no other light, and the green light closes on a steady bearing. In this case:
• We are overtaking a pilot vessel under way. What lights do we see?
• A shape of two cones joined at their points in a vertical line identifies vessels:
• At night we see dead ahead the masthead light and both sidelights of a power-driven vessel. What situation are we in?
• In thick fog, we detect only by radar a vessel closing on a collision course on our port bow, crossing. In these circumstances:
• When must navigation lights be shown?
• We sight a vessel showing a shape consisting of a cone with its apex downwards. It is:
• A vessel restricted in her ability to manoeuvre, by day, will show:
• In restricted visibility, a power-driven vessel under way but stopped and making no way through the water will sound:
• The masthead light shows an unbroken light over an arc of:
• Under Rule 14 of the RIPA, "When two power-driven vessels are meeting on reciprocal courses, with a risk of collision..."
• A traffic separation zone may be entered:
• A sailing vessel shall keep out of the way of
• A short blast lasts approximately:
• Under power, we see a power-driven vessel approaching on our port side, keeping a steady bearing. The first thing we must do is:
• Under Rule 10 of the International Regulations for Preventing Collisions at Sea, fishing vessels...
• Rule 9. Vessels proceeding along a narrow passage or channel...
• Rule 21. "Sidelights" are a
• Rule 27, vessels not under command or restricted in their ability to manoeuvre: "Vessels not under command shall show..."
• RULE 12. A sailing vessel with the wind on her port side sees another sailing vessel to windward and cannot be sure whether it has the wind on its port or starboard side. What should she do?
• RULE 28. What does a vessel showing three all-round red lights in a vertical line indicate?