Speedophile
The Seashark is a Speedophile boat returning from earlier GTA games.
Image: Rockstar GamesAirboat 09
First shown: Official Screenshot: Grassrivers 01 & 03
BTN Delmar
First shown: Trailer 1 (0:23)
Dinghy
The Dinghy is a Nagasaki boat returning from earlier GTA games.
Image: Rockstar GamesKayak
First shown: Rockstar media: Ultimate Edition (Jason's safehouse)