This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.
21: INLAND ONLY The stand-on vessel in a crossing situation sounds one short blast of the whistle. This means that the vessel __________.
N a. intends to hold course and speed N b. is changing course to starboard N c. is changing course to port Y d. intends to leave the other on her port side 48: INLAND ONLY Which statement is TRUE concerning the fog signal of a vessel 15 meters in length, anchored in a "special anchorage area" approved by the Secretary?
Y a. The vessel is not required to sound a fog signal. N b. The vessel shall ring a bell for 5 seconds every minute. N c. The vessel shall sound one blast of the foghorn every 2 minutes. N d. The vessel shall sound three blasts on the whistle every 2 minutes. 89: INLAND ONLY Your vessel must stay within a narrow channel to be navigated safely. Another vessel is crossing your course from starboard to port. You do NOT think she will pass safely. You __________.
N a. may sound the danger signal Y b. must sound the danger signal N c. should sound one short blast to indicate that you are holding course and speed N d. are required to back down 153: BOTH INTERNATIONAL & INLAND You are underway at night and you sight the lights shown. You know these lights indicate a __________. (DIAGRAM 47 )
N a. fishing vessel engaged in fishing N b. trawler dragging nets Y c. sailing vessel N d. dredge at work 209: INLAND ONLY A single vessel being towed alongside shall show __________.
N a. one all-round white light N b. sidelights and a stern light N c. only the outboard sidelight and a stern light Y d. a special flashing light, sidelights, and a stern light 278: INLAND ONLY While underway you sight the lights shown with the yellow lights flashing. The lights displayed should be __________. (DIAGRAM 81 )
N a. visible for at least one mile N b. more than 50 meters apart Y c. visible at night and during periods of restricted visibility N d. flashing at intervals of 120 flashes per minute 288: BOTH INTERNATIONAL & INLAND The tow shown is less than 200 meters in length and severely restricted in her ability to deviate from her course. Which dayshape(s) would be displayed by day from the vessel(s)? (DIAGRAM 24 )
Y a. ball-diamond-ball on the towing vessel N b. diamond on the towing vessel N c. diamond on the last barge N d. All of the above 363: BOTH INTERNATIONAL & INLAND Two power-driven vessels are crossing as shown. Vessel "A" sounds one short blast on the whistle. Vessel "B" is the __________. (DIAGRAM 42 )
N a. burdened vessel N b. give-way vessel N c. overtaking vessel Y d. None of the above 4048: BOTH INTERNATIONAL & INLAND If it becomes necessary for a stand-on vessel to take action to avoid collision, she shall NOT, if possible, __________.
N a. decrease speed N b. increase speed Y c. turn to port for a vessel on her own port side N d. turn to starboard for a vessel on her own port side 4109: BOTH INTERNATIONAL & INLAND A vessel towing in fog shall sound a fog signal of __________.
N a. one prolonged blast every one minute N b. two prolonged blasts every two minutes Y c. one prolonged and two short blasts every two minutes N d. one prolonged blast every two minutes 4145: BOTH INTERNATIONAL & INLAND You are in charge of a 120-meter power-driven vessel at anchor in fog, sounding the required anchor signals. You hear the fog signal of a vessel underway off your port bow. You may sound __________.
N a. at least five short and rapid blasts N b. two short blasts Y c. one short, one prolonged, and one short blast N d. three short blasts 4190: BOTH INTERNATIONAL & INLAND A power-driven vessel making way through the water sounds a fog signal of __________.
Y a. one prolonged blast at intervals of not more than two minutes N b. two prolonged blasts at intervals of not more than two minutes N c. one prolonged blast at intervals of not more than one minute N d. two prolonged blasts at intervals of not more than one minute 4217: BOTH INTERNATIONAL & INLAND A man aboard a vessel, signaling by raising and lowering his outstretched arms to each side, is indicating __________.
N a. danger, stay away N b. all is clear, it is safe to pass N c. the vessel is anchored Y d. a distress signal 4303: BOTH INTERNATIONAL & INLAND In fog, you hear apparently forward of your beam a fog signal of 2 prolonged blasts in succession every two minutes. This signal indicates a __________.
N a. power-driven vessel making way through the water N b. vessel being pushed ahead N c. vessel restricted in her ability to maneuver Y d. power-driven vessel underway but stopped and making no way through the water 4390: BOTH INTERNATIONAL & INLAND What lights must sailboats show when underway at night?
N a. One all-round white light N b. A stern light N c. Red and green sidelights Y d. Red and green sidelights and a stern light 4446: BOTH INTERNATIONAL & INLAND Which is NOT a distress signal?
N a. A continuous sounding with any fog signal apparatus N b. A signal sent by radiotelephone consisting of the spoken word "Mayday" N c. An International Code Signal of N.C. Y d. The firing of green star rockets or shells 4517: BOTH INTERNATIONAL & INLAND Which vessel must exhibit forward and after masthead lights when underway?
N a. A 200-meter sailing vessel Y b. A 50-meter power-driven vessel N c. A 100-meter vessel engaged in fishing N d. All of the above 4529: BOTH INTERNATIONAL & INLAND A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights __________.
Y a. do not interfere with the keeping of a proper look-out N b. are not the color of either sidelight N c. have a lesser range than the prescribed lights N d. All of the above 4553: BOTH INTERNATIONAL & INLAND Which day-shape would a vessel aground show during daylight?
N a. One black ball N b. Two black balls Y c. Three black balls N d. Four black balls 4575: BOTH INTERNATIONAL & INLAND A vessel is overtaking when she can see which light(s) of a vessel ahead?
Y a. Only the stern light of the vessel N b. One sidelight and a masthead light of the vessel N c. Only a sidelight of the vessel N d. The masthead lights of the vessel 4580: BOTH INTERNATIONAL & INLAND You see a vessel displaying ONLY the lights shown. This could be a __________. (DIAGRAM 45 )
Y a. pilot vessel less than 50 meters, underway and NOT engaged on pilotage duty N b. vessel engaged in fishing N c. vessel aground less than 50 meters N d. vessel engaged in dredging at anchor with an obstruction on one side 4633: BOTH INTERNATIONAL & INLAND If practical, when shall a manned vessel being towed sound her fog signal?
N a. Immediately before the towing vessel sounds hers Y b. Immediately after the towing vessel sounds hers N c. As close to the mid-cycle of the towing vessel's signals as possible N d. At any time as long as the interval is correct 4655: BOTH INTERNATIONAL & INLAND Which vessels shall turn off their sidelights?
N a. All vessels that are not under command Y b. All fishing vessels that are not making way N c. All sailing vessels which are becalmed N d. All vessels engaged in underwater operations 4820: BOTH INTERNATIONAL & INLAND You are about to cross a narrow channel when you see an approaching vessel that can only be navigated safely within the channel. You should __________.
N a. cross the channel as you are the stand-on vessel N b. cross only if the vessel in the channel is approaching on your port side Y c. not cross the channel if you might impede the other vessel N d. sound the danger signal 4870: BOTH INTERNATIONAL & INLAND When do the Rules require both vessels to change course?
N a. Any time the danger signal is sounded N b. When two power-driven vessels are crossing and it is apparent to the stand-on vessel that the give-way vessel is not taking appropriate action Y c. When two power-driven vessels are meeting head-on N d. All of the above 5150: BOTH INTERNATIONAL & INLAND There are two classes of vessels which do not have to comply with the rule regarding traffic separation schemes, to the extent necessary to carry out their work. One of those is a vessel __________.
N a. engaged in fishing N b. towing another Y c. servicing a navigational aid N d. on pilotage duty 6510: BOTH INTERNATIONAL & INLAND You hear the fog signal of another vessel forward of your beam. Risk of collision may exist. You MUST __________.
Y a. take all way off, if necessary N b. stop your engines N c. begin a radar plot N d. All of the above 8058: INTERNATIONAL ONLY Which vessel is to keep out of the way of the others?
N a. A vessel constrained by her draft N b. A vessel engaged in underwater operations Y c. A vessel engaged in trawling N d. A vessel not under command 8067: INTERNATIONAL ONLY Which vessel shall avoid impeding the safe passage of a vessel constrained by her draft?
N a. A vessel not under command Y b. A fishing vessel N c. A vessel restricted in her ability to maneuver N d. All of the above 8121: INTERNATIONAL ONLY Which statement is TRUE, according to the Rules?
Y a. A vessel engaged in fishing while underway shall, so far as possible, keep out of the way of a vessel restricted in her ability to maneuver. N b. A vessel not under command shall keep out of the way of a vessel restricted in her ability to maneuver. N c. A fishing vessel while underway has the right-of-way over a vessel constrained by her draft. N d. A vessel not under command shall avoid impeding the safe passage of a vessel constrained by her draft.