I have both on board and they both work fine. The sat phone is a good choice because yes when you have a problem one push of the button and the coast guard is there. Sometimes when calling the coast guard either vhf or ssb there may be a delay because it has happened to me. I use the ssb for finding out where the fish are and whats going on in the canyons. Sat phones are world wide coverage and getting intouch with someone is better that no one hearing you at all even if you called your wife and she called the coast guard and related messages to them. I would go with the sat phone because you still have a vhf and can still get a may day off to another vessel in the canyon. Everyone has a vhf and not a ssb. Just my opinion and yes I do fish the canyons.