Nav Flashcards
Caution areas
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
Danger areas
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
Fix intervals
Shoal- 10 min
Restricted-10 min
Harbor or near coastal- 15 min
Open ocean/lake-30 min
Ais modes
Normal
Receive only
Encrypted
Deviation
Difference between compass’s magnetic heading and the actual magnetic heading of the vessel.
Variation
Difference between true north and magnetic north