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15 Cards in this Set
- Front
- Back
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What is the determination of position by advancing a previous position for courses and distances
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Dead reckoning
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What is the term for a line or anything else running from side to side of a boat
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Athwartships
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What is the average height of all high-tide water levels measured over a 19 year period
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Mean High Water
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This is the period that occurs while the current is changing direction and has no horizontal motion
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Slack water
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What usually occurs when the propeller rotates at a very high speed and a partial vacuum forms air bubbles at the tips of the propeller blades
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Cavitations
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What yellow light lias the same characteristics as the "stem light"
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Towing Light
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On a vessel, what white light is placed as near the stem as possible, showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the tight 67.5 degrees from right aft on each side of the vessel
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Stern Light
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What light shows an unbroken tight over an arc of the horizon of 360 degrees
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All-around light
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What is die duration of a "short blast"
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About one second's duration
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What is the duration of a 'prolonged blast"
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From four to six seconds' duration
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What rule covers short blasts and prolonged blasts
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Rule 32
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What is relative bearing
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Relative bearing of an object is its direction from the boat's bow at 000 degrees, measured clockwise through 360 degrees
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This is a condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar
causes? |
Restricted visibility
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What is best described as the development of a low-pressure area on the forward face of the blade and a high-pressure area on the
after face of the blades, forcing it in a stream toward the stem? |
Propeller action
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On a vessel, what white tight is placed over the fore and aft centerline of the vessel showing an unbroken light over an arc of the
horizon of 225 degrees, and so fixed to show 22.5 degrees abaft the beam on either side of the vessel? |
Masthead Light
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