Apprentice Mate (Steersman) of Towing Vessels Practice Test

1. 1. You attach a line to a stationary barge lying off your starboard beam in order to maneuver it into position to make up tow. Which line is used to accomplish thi...
2. 2. What is the Vapor pressure of ethylene oxide at 46° C?
3. 3. What is a grapnel?
4. 4. Which document shows a vessel's nationality, ownership, and tonnage?
5. 5. When does a vessel which is being assisted by an icebreaker display a flag hoist consisting of the code numeral "4"?

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1. 1. What does a pyrometer measure on a diesel engine?
2. 2. Which is an indication that progressive flooding is occurring?
3. 3. What is the minimum number of people required to safely handle a 1-1/2 inch fire hose?
4. 4. Which extinguishing agent is best for use on a magnesium fire?
5. 5. The vessel shown in the illustration has broken down and you are going to take her in tow. The wind is coming from her starboard beam. You are making more leewa...

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1. 1. You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. What does this indicate?
2. 2. In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstrea...
3. 3. On a working copy of a weather map, a cold front is represented by what color line?
4. 4. What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?
5. 5. Under the IALA cardinal system, what does a mark with a quick white light showing 6 flashes followed by one long flash indicate in relation to the location of t...

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1. 1. How are aids to navigation marking the intracoastal waterway (ICW) identified?
2. 2. What do solid green arrows on the main body of a pilot chart indicate?
3. 3. Which term defines the paths of intended travel between three or more points?
4. 4. Which of the following is the most accurate method of determining gyrocompass error while underway?
5. 5. On a working copy of a weather map, a cold front is represented by what color line?

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1. 1. The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (1...
2. 2. At 0930 you obtain a position from the following information: Race Rock Light bears 110°T at a range of 1.4 miles, and Goshen Point bears 330°T at a range of 3....
3. 3. At 1000 buoy "PI" is abeam to starboard a distance of 0.5 mile. From this position, with a set of 295° and a drift of 1.6 knots, what course must you steer to a...
4. 4. At 1130, Horton Point Light bears 172°T at a range of 3.45nm. The fathometer reads 81 ft. Which of the following describes your position?
5. 5. At 1155 your vessel's position is LAT 41°09.0'N, LONG 72°34.4'W. If you make good a course of 282°T and a speed of 10.0 knots, when will you arrive at New Haven...

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1. 1. On 14 October 2023, you will be docking at the Southern Branch Elizabeth River, VA at the second high tide. The berth is located between NOAA reference tidal st...
2. 2. You wish to check the deviation of your standard magnetic compass. You find a natural range that you steer for and note that the gyrocompass heading is 034°, an...
3. 3. At 2237 ZT on 14 July you are in DR position LAT 33°57'N, LONG 150°32'W, when you observe an amplitude of Saturn. The planet is about one Sun's diameter above t...
4. 4. On 7 December your 0350 ZT position is LAT 35°42'N, LONG 17°38'E. You observe Polaris bearing 359.7°pgc. At the time of the observation the helmsman noted that...
5. 5. You are underway on course 106°T at a speed of 15.3 knots. You sight a buoy bearing 109°T at a radar range of 3.6 miles at 1725. If you change course at 1728, w...

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1. 1. You observe the lower limb of the Sun at a sextant altitude (hs) of 28°24.7' on 17 May. The index error is 1.5' off the arc. The height of eye is 86 feet (26 me...
2. 2. You have steamed 216 miles and consumed 19.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 315 miles?
3. 3. On 12 November, you are taking a time tick using the 1600 GMT BBC Broadcast. You hear five pulses followed by a longer pulse. At the start of the longer pulse y...
4. 4. On 23 May your 0628 zone time position was LAT 28°18.0'S, LONG 102°42.0'E. Your vessel was steaming on course 040°T at a speed of 20.0 knots. An observation of...
5. 5. On 13 February at 0325 zone time, your DR position is LAT 23°20'N, LONG 155°15'W. You are steering 240°T at a speed of 13.6 knots. What is the zone time of sunr...

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1. 1. Which action must be taken for uncleared crew curios remaining on board during a domestic coastwise voyage after returning from foreign?
2. 2. What does "Hanging a barge off" refer to?
3. 3. What is the purpose of a "check" line?
4. 4. What is the effect of excessive catenary in shallow water?
5. 5. When should you conduct a visual inspection of your towline?

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1. 1. How does combustion air enter the cylinder of a two-cycle diesel engine?
2. 2. What is the best indication of the loading of a diesel engine?
3. 3. If you must swim through an oil fire, which action should be avoided?
4. 4. After having thrown the liferaft and stowage container into the water, the liferaft is inflated by __________.
5. 5. Which is TRUE if passengers are on board when an abandon ship drill is carried out?

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1. 1. Which is TRUE concerning Light Lists for coastal waters?
2. 2. While proceeding up a channel on course 010° per gyrocompass, you notice a pair of range lights in alignment with the masts of your vessel when viewed forward....
3. 3. On a nautical chart, what does the inner ring of a compass rose indicate?
4. 4. Which is TRUE if the compass heading and the magnetic heading are the same?
5. 5. What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?

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1. 1. The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at w...
2. 2. At 2000 Hog Island Lighted Bell Buoy "12" bears 199°T and Buoy "GM" bears 249°T. What is your position?
3. 3. From your 2000 position you change course to 206°T. What time would you expect to be abeam of Hog Island Buoy "12"?
4. 4. You should expect to pass how far off buoy "12"?
5. 5. At 2030 you take the following bearings: Sand Shoal Inlet South Light - 275°T Cape Charles Light - 235°T What is the set and drift from 2000 to 2030?

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