I've been on boats where "securing" a tank was done by placing it on the deck with bags to hold it in place. I didn't have a problem with that. However, the OP had to make their own call and did.
Personally I think that having a local dive boat that does local dives (mainland coast) even if they can be done from shore provides a good niche service.
Personally I think that having a local dive boat that does local dives (mainland coast) even if they can be done from shore provides a good niche service.