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Which of the following words means a deep sounding fog warning in which the sound is produced by passage of air across holes in a rotating disc?

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What tool should be soft and used only for rubbing out pencil marks or tracks on charts?

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When you are ordered to replace range of light to, 10M 32°36'-90S., 60°54'-18E, that means

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When you are ordered to calculate gyro checks, that means

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Which of the following words means a small box with buttons on it, used to put information into a computer?

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If a channel buoy has a low number it means …

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When you are ordered to manage communications, that means

When you see a lighthouse that means

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the factors that may cause collision in congested waters.

Which of the following words means a navigation

aid that warns mariners of dangerous shallows and perilous rocky coasts, and they help

guide vessels safely into and out of harbors?