Submarine pieces are 30 wrecked submarine parts scattered across the sea floor off the coast of Paleto Cove in Story Mode, collected for a woman named Abigail during the Death at Sea strand. Finding all 30 completes that strand. Every piece sits underwater, so this hunt needs a diving mask or a submersible vehicle rather than anything you can do on foot or by car, and low visibility on the sea floor can make spotting wreckage slower than a surface based hunt. Because the wreck is concentrated off Paleto Cove rather than spread across the whole map, the search stays fairly contained once you know the general area to search. Since the reward is tied directly to finishing Abigail's questline, this set works best treated as part of that story thread rather than a pure side collectible.
Meet Abigail at the Sonar Collections Dock as Michael to open the strand, then dive for the pieces with the submersible or scuba gear from a Dinghy.
All 30 pieces complete the strand and its final confrontation with Abigail. The wreck sites are deep, so watch your air.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.