Nav Flashcards

1
Q

Caution areas

A

Montrose- sailing buoys/hook

Belmont harbor shoal- nun buoy

Wilmette harbor- tower road/Evanston boat ramps prone to shoaling

Zion water intake-multiple pilings 100 yard restricted zone for our boats

Waukegan harbor-entrance can be misleading at night has three jetties with appropriate Aton

Kenosha harbor- large breakwater jetty

Racine-Pershing park boat launch shallow conditions at entrance jetties

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2
Q

Danger areas

A

Glencoe shoal- shall not go within 350 yards unless for urgent SAR

Highland park rock- size unknown shall not go within 350 yards unless for urgent SAR

Racine reef- marked shoal east of Racine harbor shall not transit within 0.3 nm of lighted air

Wind point shoals- north and south marked shoal with danger marker light shall not transmit within 0.5 nm

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3
Q

Fix intervals

A

Shoal- 10 min
Restricted-10 min
Harbor or near coastal- 15 min
Open ocean/lake-30 min

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4
Q

Ais modes

A

Normal
Receive only
Encrypted

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5
Q

Deviation

A

Difference between compass’s magnetic heading and the actual magnetic heading of the vessel.

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6
Q

Variation

A

Difference between true north and magnetic north

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