"Boat diving" refers to the activity of diving underwater while being onboard a boat. It means diving into the water from a boat rather than from the shore. Full definition
The High Five — A five dive punch card for boat diving and snorkeling trips at a seriously discounted price for $ 450. (pacificprodive.com)
One day of academics and pool, and two days of boat diving. (oahuscubadiving.com)
Daily boat diving trips give access to more than 35 sites along the island's north coast and west end, with travel times typically between five minutes and a half hour. (caradonna.com)