NONCOMMERCIAL - Working channels for voluntary boats. Messages must be about the needs of the ship. Typical uses include fishing reports, rendezvous,scheduling repairs and berthing information. Use Channels 67 and 72 only for ship-to-ship messages.
9(fn6), 68, 69, 71, 72, 78, 79(fn4), 80(fn4)
I usually use 69.
For full info:
http://wireless.fcc.gov/marine/vhfchanl.pdf