Submarine Pieces are underwater wreck fragments around the coastline, tied to the Sonar Collections Dock side activity.
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Los Santos
Los Santos — Submarine Pieces locations and map hints for this area.
Blaine County
Blaine County — Submarine Pieces locations and map hints for this area.
Work clockwise from the northern coast through Mount Gordo, Paleto Bay, Zancudo and the southern shore to avoid crisscrossing the ocean. Every piece sits underwater, so a boat with dive capability is the practical baseline, and Trackify helps keep the search ordered. The dock pays per piece with a larger completion bonus, separate from the Nuclear Waste barrels that use the same watercraft.
FAQ
Do I need a submarine?
The Dock activity uses a submersible and dive approach; standard swimming without equipment is much less reliable.
Is the payout per piece?
Yes, with an additional completion bonus for the full set.
Are they related to Nuclear Waste?
They share watercraft ideas but are a separate collection with its own coastal sweep.

