I assume you are concerned about tipping on San Diego sport boats. I tip about 15% -- and usually throw a little extra at a deckhand if he is especially helpful.
I'm with AK, usually tip about 15%. General suggestion, 10-20% based upon service provided. I'm usually on the Rooster, and with that crew my tip averages a bit over 15%. Some other boats and experience on a charter, well it can be 10%.
