Free USCG-2M-UNL Practice Questions

Question 1

In open water and clear weather under the International Rules, your power-driven ship has another power-driven vessel on her port side in a crossing situation. At 6 miles, that vessel makes an early, substantial alteration to pass astern. Subsequent observations confirm a safe passing distance, and no other hazard is developing. As the encounter continues, your ship should:

Accepted Answer

Keep course and speed while checking that the other vessel passes clear.

Answer

Reduce speed to give the other vessel an opportunity to cross ahead instead.

Answer

Stop engines until the other vessel has completed her passage across your stern.

Answer

Alter to starboard to match the other vessel's new course and avoid crossing.

Question 2

A ship moving ahead parallel to a close starboard bank begins to sheer to port while her stern moves toward the bank. There has been no change in rudder angle, and wind and current are negligible. Which pressure pattern explains this bank interaction?

Accepted Answer

Increased pressure near the starboard bow and reduced pressure near the starboard quarter.

Answer

Reduced pressure near the starboard bow and increased pressure near the starboard quarter.

Answer

Reduced pressure along the entire starboard side, drawing bow and stern equally toward the bank.

Answer

Increased pressure along the entire starboard side, pushing bow and stern equally away from the bank.

Question 3

The departure loading condition gives displacement 12,000 tonnes, KM 9.30 m, KG 8.10 m, and a total free-surface moment of 4,800 tonne-metres. The approved minimum corrected GM for this condition is 0.60 m; every other applicable loading criterion has been satisfied. Which entry correctly completes the stability check?

Accepted Answer

Corrected GM 0.80 m; the approved minimum GM is satisfied.

Answer

Corrected GM 0.40 m; revise the loading condition before departure.

Answer

Corrected GM 1.20 m; the approved minimum GM is satisfied.

Answer

Corrected GM 1.60 m; the approved minimum GM is satisfied.

Question 4

Both ECDIS displays suddenly place the ship 0.4 mile east of her expected position. The displays share one GNSS receiver. Simultaneous radar ranges and visual bearings to correctly identified fixed objects produce a consistent fix west of the displayed position. Heading and observation times have been checked, and there is ample sea room. How should the bridge team establish the position to use?

Accepted Answer

Use independent terrestrial fixes while investigating the common GNSS position input.

Answer

Accept the electronic position because agreement between two displays confirms the receiver's accuracy.

Answer

Average the electronic and terrestrial positions to reduce the effect of either source's error.

Answer

Use a nearby ship's AIS symbol on the same displays to validate their own-ship position.

Question 5

A star sight has a fully corrected observed altitude Ho of 42°18.6′. At the assumed position, the computed altitude Hc is 42°24.2′ and the true azimuth Zn is 073°. Select the correct plotting instruction for the resulting line of position.

Accepted Answer

From the assumed position, measure 5.6 NM along 253°T; draw the line on 163°-343°T.

Answer

From the assumed position, measure 5.6 NM along 073°T; draw the line on 163°-343°T.

Answer

From the assumed position, measure 5.6 NM along 253°T; draw the line on 073°-253°T.

Answer

From the assumed position, measure 6.4 NM along 253°T; draw the line on 163°-343°T.

Question 6

In fog, a power-driven ship detects a vessel by radar alone, 35° on her port bow. Systematic plotting establishes risk of collision; this is not an overtaking situation. There is ample sea room, and trial plots show that a substantial alteration either to port or to starboard would produce a safe passing distance without creating another close-quarters situation. Which course of action accords with the International Rules?

Accepted Answer

Choose the substantial starboard alteration, then monitor its effectiveness until the other vessel is past and clear.

Answer

Choose the port alteration to pass astern, treating the radar encounter as an ordinary crossing situation.

Answer

Keep course and speed because the other vessel is on the port side and must keep out of the way.

Answer

Make a succession of small starboard alterations, reassessing the plot after each to avoid an unnecessarily large turn.

Question 7

A bulk carrier is offered a Group A cargo with a valid, representative moisture-content result of 8.7% and a transportable moisture limit of 8.2%. The ship is not specially constructed or equipped to carry this cargo above its transportable moisture limit. The terminal presents a dry-looking handful and asks to begin loading. What should the chief mate require?

Accepted Answer

Withholding acceptance until valid representative testing establishes moisture content below the transportable moisture limit.

Answer

A satisfactory shipboard can test on the handful before accepting the existing cargo certificates.

Answer

Loading in shallow layers with careful trimming to prevent moisture collecting in the lower cargo.

Answer

Additional shifting boards and a reduced cargo quantity to limit the consequences of cargo movement.

Question 8

An able seafarer is found unresponsive at the bottom of a ballast tank. The atmosphere has not been tested. At the access hatch, another crew member puts on an emergency escape breathing device and asks a shipmate to tend a lifeline for an immediate entry. The officer arriving at the hatch must first:

Accepted Answer

Prevent the entry, raise the alarm, and mobilize trained rescuers with self-contained breathing apparatus.

Answer

Permit the entry with the lifeline tended, provided the escape device has its full rated duration available.

Answer

Start ventilation and permit entry once a normal oxygen reading is obtained at the tank's open hatch.

Answer

Check for flammable gas at the hatch and permit entry with the escape device if none is detected.

Question 9

The marine forecast gives a significant wave height of 4 m. During the forecast period, the bridge team observes an individual wave measuring 7 m from trough to crest. Which interpretation belongs in the weather briefing?

Accepted Answer

The 4 m value is the average height of the highest one-third of waves; a 7 m individual wave can occur.

Answer

The 4 m value is the maximum expected trough-to-crest height; the 7 m observation therefore disproves the forecast.

Answer

The 4 m value is the average height of all waves; smaller waves must offset the 7 m wave in that average.

Answer

The 4 m value is the average crest height above still water; a 7 m trough-to-crest wave is therefore within it.

Question 10

On a coastal leg, the intended track over the ground is 000°T. The ship will make 10.0 knots through the water, and the current sets 090°T at 2.0 knots. With no wind or leeway, which approximate course to steer and resulting speed over the ground will keep the ship on the intended track?

Accepted Answer

348.5°T and 9.8 knots.

Answer

011.5°T and 9.8 knots.

Answer

348.7°T and 10.2 knots.

Answer

000.0°T and 10.2 knots.

Free USCG-2M-UNL Practice Questions

Domain 1: Navigation

Question 1

Question 2

Domain 2: Deck General

Question 3

Question 4

Domain 3: Navigation General

Question 5

Question 6

Domain 5: Deck Safety

Question 7

Question 8

More USCG-2M-UNL practice questions

Question 9

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