| A | B |
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| What signal does the last towed vessel sound in fog if manned? | One prolonged and three short blasts. |
| What fog signals do vessels not under command or restricted in their ability maneuver sound? | One prolonged and two short blasts. |
| What fog signals are sounded by sailing vessels? | One prolonged and two short blasts. |
| When at anchor in fog, what signals do most vessels under 100 meters long sound? | A bell is rung rapidly for about 5 seconds at maximum intervals of 1 |
| In fog, if you hear rapid ringing of a bell and then sounding of a gong, what does it mean? | An anchored vessel over 100 meters long. |
| While at anchor in fog, if you detect a vessel coming too close to you, what signal should you give? | Sound one short, one prolonged and one short blast. |
| If you hear three separate and distinct strokes before and after the rapid ringing of a bell, when in fog, what does it mean? | A vessel aground. |
| If you hear four short blasts after another fog signal, what does it mean? | A pilot vessel. |
| When are fog signals not required at anchor? | In Inland waters when a vessel under 20 meters, a barge or other nondescript craft is anchored in a designated special anchorage. |
| The following are not authorized distress signals in International Waters | A high intensity flashing white light. A national ensign upside down. |
| What signal, other than a distress signal, means "I require assistance"? | Three short blasts and one prolonged blast. |
| What does two short and one prolonged blast mean? | You are standing into danger. |
| What does a signal of two short blasts, one prolonged blast, and one short blast mean? | "I am disabled. Communicated with me." |
| Inland Navigational Rules apply to _________. | to All vessels. |
| Vessels are within sight of each other when _________ | each can be seen from the other. |
| When the compass bearing of any part of an approaching vessel does not change, ________ | you are on a collision course. |
| A vessel wishing to overtake you in a narrow channel in international waters sounds two prolonged and two short blasts. If you agree you sound______ | one prolonged and one short, one prolonged and one short. |
| When approaching a bend in a narrow channel, you hear one prolonged blast. You should sound______ | sound one prolonged blast…and watch out. |
| In International Traffic Separation Schemes vessels fishing shall not ___ | impede any other vessel operating in a traffic lane. |
| Vessel traffic services exist only _____ | only in Inland Rules waters. |
| Rules for the conduct of vessels in sight of one another apply when ____ | one vessel can be seen from the other. |
| When two sailing vessels are at risk of collision the vessel which has the wind on the port side must _____ | keep clear of the one with the wind on the starboard side. |
| If a vessel with the wind on her port side cannot tell whether one to windward has the wind on her port or starboard side, _____ | she should give way. |
| A vessel being overtaken stands on with respect to all other vessels at all times. | You cease to be an overtaking vessel when you are past and clear of the overtaken vessel. |
| When two power driven vessels are crossing so as to involve risk of collision the vessel to port must ______ | keep clear. |
| Under the International Rules, maneuvering and warning signals are _______ | not answered by the other vessel unless she is doubtful, apprehensive or is maneuvering herself. |
| Two short blasts means…under Inland Rules _______ | I intend to turn to port. (one is starboard, two is port) remember "to port". |
| Five or more short blasts are sounded by a sailing vessel to indicate _______ | doubt. Or any other vessel to indicate doubt. |
| What special precaution is necessary when using the Bridge to Bridge Radio Telephone? (to avoid collisions) | Each vessel must know the identity and position of the other. |
| In restricted visibility, which is the stand on vessel? | None. |
| In restricted visibility, if you detect a vessel on your radar what must you do? | Make a systematic observation or make a radar plot. |
| In restricted visibility, you hear one prolonged blast, and two minutes later, you hear another. What is it? | A power driven vessel underway. |
| In restricted visibility, what signal does a vessel trawling make? | One prolonged and two short blasts. |
| What lights does a vessel trawling show? | Green over White. Trawling at night. |
| What lights does a pilot vessel show? | White over red. Pilot ahead. |
| What lights does a sailing vessel show? | Red over Green. A sailing machine. |
| What lights does a fishing vessel show? | Red over white. Fishing at night. |
| What does a single white light indicate? | A vessel at anchor. Or a vessel under 7 meters propelled at less than 7 knots. |
| What does two white lights, with red and green mean? | Power driven vessel over 50 meters. |
| What does a red over red over red light mean? | A vessel constrained by draft. |
| A vessel aground under 100 meters in length makes what sounds? | 3 bell strokes, rapid ringing of bell for 5 seconds, then three bell strokes. |
| A vessel aground If 100 meters or more in length makes what sounds? | 3 bell strokes, rapid ringing of bell for 5 seconds, then three bell strokes forward, then rapid ringing of gong for 5 seconds at the stern. |
| What lights does a vessel aground show? | Red, Red, White. Aground at night. |
| You are being towed in your disabled boat, what signal do you sound? | One prolonged and three short blasts. |
| What signal does an anchored dredge sound while dredging? | One prolonged and two short blasts at least every two minutes. |
| You see a vessel heading for a reef on your radar. What should you do? | Sound two short blasts and one prolonged blast and attempt radio contact. |
| When and where should you use a strobe light to warn other vessels of your presence? | Never. |
| A vessel near you hoists a large towel above a yellow beach ball. What, if anything does it mean? | Immediate help is needed…it is a distress signal. |
| As you approach a small open boat, the occupant stands up and waves his arms up and down at his sides. What is he telling you? | He needs immediate help…it is a distress signal. |
| All required navigational lights shall be shown from ________to _____________. | sunset to sunset. |
| Side lights have an arch of visibility of _____________ degrees. | 122.5 degrees. |
| A flashing yellow light, as defined by the NavRules, flashes at least ____________ times per minute. | 120 times per minute. |
| A dredge pipeline in Inland Waters is identified by? | Yellow lights flashing 50 to 70 times per minute. |
| An Air Cushion vessel operating in the non displacement mode exhibits in addition to her other required lights? | An all around yellow light flashing 120 times per minute or more. |
| A vessel less than 50 meters long propelled by power and sail must? | Display a white light showing through and unbroken arc of 225 Display a white light showing through and unbroken arc of 225 stern light. |
| In International Waters a power driven vessel less than 7 meters in length whose speed does not exceed 7 knots may exhibit? | A white all around light instead of all other lights. |
| Two white lights in a vertical line indicate? | An approaching power driven vessel. |
| In Inland Waters an amber light flashing once per second for three seconds followed by an interval of three seconds indicates? | A submarine on the surface. |
| A vessel over 7 meters long propelled by oars must? | If not displaying the lights for a sailing vessel of her length, have ready at hand an electric torch, which shall be exhibited in time to prevent collision. |
| In Inland Waters, you see two yellow lights, one above the other. You are looking at? | A tug pushing ahead or towing alongside. |
| In fog, you see a vessel with a single diamond shape ahead of you. She is? | The tug or last vessel of a tow more than 200 meters in length. |
| You see four white lights in a vertical line between a red light and a green one. You are looking at? | A tug with a tow over 200 meters. One white light for vessel under 50 meters, two white for tow over 200 meter, one light on tow. |
| In Inland Waters, you see two white lights and a yellow light flashing once a second between a red and green light. You are looking at? | A tug with a vessel being pushed ahead which conceals the tug's sidelights. Navrules page 61. |
| You see three green lights in a triangle above and to one side of a white light. What are you looking at? | A vessel sweeping mines heading away from you. |
| What lights would a vessel over 50 meters in length dredging while making way with a barge on her port side display when viewed from ahead? | Three green lights on her starboard side, a vertical line of white over white over red over white over red amidships, and three red lights on her port side. |
| Dredging lights White / White = | Greater than 50 meters |
| Dredging lights Green / Green | OK to pass on Starboard side. |
| Dredging lights Red /Red | obstruction on Port side. |
| Dredging lights Red / White / Red | = Underwater operations (dredging |
| The special lights and shapes for a vessel aground need not be shown unless? | The vessel is over 12 meters long. |
| The day shapes for a vessel not under command, under way but not making way are? | Two balls. The lights would be two red…the captain is dead. |
| A purse seiner hampered by her gear may display? | Two yellow lights in a vertical line. These two lights shall flash alternately every second with equal light and occultation duration. She shall also display red over white all around lights. |
| The side lights of a power driven vessel under 12 meters in length shall be carried? | At least one meter below the masthead light. |
| Under International Rules, a sailing vessel when proceeding under sail and powered by machinery, is required to display what day shape? | A conical shape, apex downwards. |
| Under Inland Rulesa sailing vessel when proceeding under sail and powered by machinery, is required to display what day shape? | A conical shape, apex downwards, except vessels under 12 meters need not display day shape. |
| A vessel not under command may have ___________ | a jammed rudder. |
| A safe speed is determined by _________ | the operator's judgement. |
| Action taken to avoid collision must be large enough to be obvious on the other vessel. Change course at least __________degrees. | 60 degrees. |
