map symbols?

[warti]

This is a dumb*#s question i know but on my garmin bluechart i see the symbols ( Co, G, Sh ). I think the G means gravel but what do the others mean? Should i go out of my way to check these areas out?

[tunaticer]

Shoal is one and the Co could be Coral possibly. Ive seen Coral on yankee maps before but never on an Australian map.

Jack.

[johnathon joe]

http://mapserver.maptech.com/mapserv...ymbols/J1.html

[Noelm]

best off to buy the correct book that explains not only those sysmbols, but also has all the lights and abeviations as well, and is a must for anyone reading charts, and is on almost every boat that does Coastal (and Long International) voyages.