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These 10 free NM2N questions are organized by exam domain, so you can see how each part of the National Master 200 NC (NM2N) blueprint is tested. Reveal the answer and explanation under each question.
In clear weather on open water, your power-driven vessel has another power-driven vessel crossing from port with risk of collision. The other vessel makes an early, substantial alteration to pass well astern of you. Successive observations confirm that its maneuver is working. Your response at this stage should be to:
Correct answer: B - Maintain course and speed.
In a narrow channel governed by the U.S. Inland Rules, your power-driven vessel intends to overtake another power-driven vessel on that vessel's port side. Both vessels are in sight, and no passing agreement has been made by radio. Which whistle exchange proposes and accepts the passage?
Correct answer: A - Two short blasts from you; two short blasts in reply.
At night, a dredger displays all-round red-white-red lights in a vertical line. It also shows two all-round red lights vertically on its west side and two all-round green lights vertically on its east side. There is adequate depth and room on the indicated passing side, and no local traffic restriction is in force. Which passage is consistent with these signals?
Correct answer: C - Pass east of the dredger.
Making way ahead near a steep starboard bank, a vessel's bow begins sheering to port while her stern draws toward the bank. There is little wind, no passing traffic, and no recent change in propulsion. The rudder responds normally. Which explanation best fits this combination of movements?
Correct answer: C - Bank cushion at the bow, with suction at the stern.
Alongside a quay, your vessel begins surging ahead. The crew can take strain on one of four slack mooring lines. Select the lead that directly checks this ahead movement.
Correct answer: D - From a foredeck bitt aft to a shore bollard.
A fixed carbon-dioxide system has just been discharged into an evacuated machinery space. Fuel and ventilation are secured, and boundary temperatures are falling. The engineer proposes opening the access hatch to check for remaining fire. Which response best preserves the extinguishing effect?
Correct answer: D - Keep the space sealed and continue monitoring from outside.
A deck crane on your vessel lifts a heavy pump just clear of its chocks. The pump hangs freely, and the boom head remains fixed. In assessing transverse stability, where is the suspended pump's weight considered to act?
Correct answer: B - At the point of suspension at the boom head.
You are following the Intracoastal Waterway in the conventional direction of buoyage shown on the chart. At a junction, the next aid is a green can buoy carrying a yellow triangle. How should you leave this aid when continuing along the ICW?
Correct answer: A - Keep it to starboard; the yellow triangle governs the ICW passage.
For a planned transit, the controlling charted depth is 10.0 feet below Mean Lower Low Water. An on-site gauge shows water 1.5 feet above that datum, rather than the predicted 2.5 feet. The vessel's deepest static draft is 8.0 feet, and squat at the planned speed is 0.5 foot. No other motion allowance applies. The required under-keel clearance after squat is 2.0 feet. Which evaluation uses the available information correctly?
Correct answer: A - 3.0 feet of clearance; the specified minimum is met.
Twenty-four minutes after a reliable fix, a new independent fix lies 0.8 nautical mile east and 0.6 nautical mile south of the dead-reckoning position for that same time. The dead-reckoning plot uses verified through-water course and speed; disregard leeway and observational error. What current set and drift does the discrepancy indicate, to the nearest degree and tenth of a knot?
Correct answer: C - 127° true at 2.5 knots.
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