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單項(xiàng)選擇題

At sea, we can use（）to fix the ship’s position.

A.steering gear
B.Loran
C.rudder indicator
D.log

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單項(xiàng)選擇題

What does “VHF” stand for?（）

A.echo sounder
B.radar
C.direction finder
D.radiotelephone

單項(xiàng)選擇題

There are some navigational instruments（）.

A.in bridge
B.on the deck
C.in the radio room
D.on the hold

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