Free NM2GI Practice Questions

Question 1

On U.S. Inland waters, your passenger launch is the stand-on vessel in an open-water crossing. Well before close quarters, the other power-driven vessel alters substantially to pass astern. Repeated observations show that the maneuver is producing a safe passing distance, with no other hazards developing. How should you handle the remainder of the encounter?

Accepted Answer

Maintain course and speed, monitoring the other vessel until it is past and clear.

Answer

Stop propulsion until the other vessel has completed its crossing.

Answer

Turn to port to make the passing distance larger still.

Answer

Increase speed to clear the other vessel's bow more quickly.

Question 2

A twin-screw workboat making steady headway moves close to a steep bank on its starboard side. In calm, current-free water, with equal ahead thrust and normal steering response, its bow begins to sheer to port while its stern moves toward the bank. Which effect best accounts for that combination?

Accepted Answer

Bank cushion acting at the bow and bank suction acting at the stern.

Answer

Shallow-water squat increasing the boat's draft and trim by the stern.

Answer

Propeller cavitation reducing the flow of water across the rudders.

Answer

Bank suction acting at the bow and bank cushion acting at the stern.

Question 3

A machinery-space fire has defeated a portable-extinguisher attack. The crew has withdrawn, everyone is accounted for, and fuel and machinery have been shut down. The exhaust fan is still running. In preparing to discharge the fixed carbon dioxide system, which step is required before gas enters the space?

Accepted Answer

Stop ventilation and close the access hatches and ventilation openings.

Answer

Keep the exhaust fan operating to circulate the gas through the machinery space.

Answer

Open the access hatch slightly to prevent pressure buildup during gas discharge.

Answer

Release one cylinder bank while ventilating, then shut the fan before releasing the remainder.

Question 4

Following the conventional direction of buoyage at a U.S. channel junction, you sight a buoy with a red upper band and a green horizontal band. Its red light flashes in a group of two followed by one. To follow the preferred channel, you would:

Accepted Answer

Leave the buoy to starboard and take the branch to its left.

Answer

Pass on either side, because this light rhythm identifies a safe-water mark.

Answer

Leave the buoy to port and take the branch to its right.

Answer

Avoid both branches until the charted isolated danger beyond the buoy is located.

Question 5

The next leg follows a straight track of 000° true. Your vessel makes 10.0 knots through the water, and a steady current sets 090° true at 3.0 knots. With no wind or leeway, which approximate heading and resulting speed over ground will keep the vessel on the planned track?

Accepted Answer

Heading 343° true; speed over ground 9.5 knots.

Answer

Heading 017° true; speed over ground 9.5 knots.

Answer

Heading 000° true; speed over ground 10.4 knots.

Answer

Heading 343° true; speed over ground 10.4 knots.

Question 6

In waters governed by the International Rules, a yacht under sail alone comes up on a power-driven launch from 35° abaft the launch's beam. While passing, the yacht draws abeam but is not yet past and clear. Who must keep out of the way at that point?

Accepted Answer

The yacht remains responsible until it is finally past and clear.

Answer

The launch must keep clear because machinery propulsion gives way to sail.

Answer

The launch becomes responsible as soon as the yacht draws abeam.

Answer

The overtaking duty ends, and the ordinary crossing rule now decides responsibility.

Question 7

An overnight anchorage has 18 feet of water when you arrive. The forecast water level will rise another 3 feet, and the bow roller will remain 4 feet above the surface. At the highest water level, the master requires at least a 7:1 scope measured from the bow roller. What is the least rode length that meets that instruction?

Accepted Answer

175 feet.

Answer

126 feet.

Answer

147 feet.

Answer

154 feet.

Question 8

The loading calculation for a vessel upright in calm water shows an uncorrected GM of 0.74 m and a free-surface-corrected GM of 0.26 m. Several broad tanks are partly full. How should the master interpret the lower figure?

Accepted Answer

Liquid movement in the slack tanks reduces the vessel's effective initial stability.

Answer

The difference represents a permanent list caused by liquid accumulating on one side of the vessel.

Answer

Free surface has changed the vessel's positive initial stability into negative initial stability.

Answer

Positive corrected GM demonstrates compliance with every intact-stability criterion for the vessel.

Question 9

After a strong wind across Lake Erie dies away, the level in a harbor continues to rise and fall, with the harbor current reversing each cycle. The cycles take tens of minutes and persist for several hours. What process best explains this behavior?

Accepted Answer

A seiche: standing oscillations continuing after the wind disturbance has ended.

Answer

A spring tide caused by lunar and solar alignment.

Answer

Wind setup maintained by a continuing onshore wind.

Answer

Ordinary wind waves left over from the earlier weather.

Question 10

In dense fog under the International Rules, a power-driven vessel is detected by radar on your port bow. Successive plots show risk of collision; the vessel is not visible. A watch officer proposes maintaining course and speed because 'the other vessel is on our port side.' What is the flaw in that reasoning?

Accepted Answer

The visual crossing rule does not assign stand-on status in a radar-only encounter.

Answer

The vessel making the higher speed must give way, regardless of the radar bearing.

Answer

Restricted visibility reverses the stand-on and give-way duties of the ordinary crossing rule.

Answer

The first radar contact forward of the beam requires both vessels to take all way off.

Free NM2GI Practice Questions

Domain 1: Rules of the Road: Inland and International (Q100); Inland-only Q300 is an alternative for the applicable restricted route

Question 1

Question 2

Question 3

Domain 2: Deck General (Q340)

Question 4

Question 5

Domain 3: Deck Safety (Q341)

Question 6

Question 7

Domain 4: Navigation General: Great Lakes and Inland (Q342)

Question 8

Question 9

Domain 5: Navigation Problems: Chart Plot (Q343)

Question 10

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