Westerly, I was confused as well when it came to installing my SSB. I was lucky in that I signed up for Gordon West's class to upgrade my tech license to a general license. He walked me through the installation, including running the copper foil to a through hull. I didn't believe it would work, but I figured, what the heck! It is easy to do and if it didn't work, I'm not out a lot. Darned if my first contact wasn't about 2500 miles away, and I have had good signal reports over to the east coat from the Los Angeles area. So it does work.
SVAuspicious has a good list and I also got a chance to chat with Gary Jensen. Gary had the best list I've found on the net yet and a great guy to talk to if you get a chance. And I'd be happy to email the list of frequencies that Gordon West downloaded to my ICOM M802. They include the most frequently used marine SSB as well as some ham frequencies.
The best contacts have been on ham though so get you general! There are a lot more hams out there than sailboats with SSB radios. And they all like to make contact and talk. They get a kick out my signals from Catalina Island.
Ps. If you buy the ICOM 802, Gary has the best premade GPS line to hook your GPS line in for the DSC function