Total Count & Distribution
There are 30 Submarine Parts scattered across Leonida's waterways and coastlines — mechanical components from a fictional Cold War-era submarine that broke apart in the waters off Vice City. All parts are located in or near water: 15 are fully submerged (requiring diving), 10 are on shorelines and docks, and 5 are inside coastal buildings near water access points.
The submerged parts follow the path of the submarine's fictional breakup trajectory — starting from deep water east of the Leonida Keys, trailing through Biscayne Bay, and ending at Port Gellhorn. Shoreline parts are placed at locations where wreckage would logically wash up: beaches, breakwaters, marina pilings, and boat yards.
Rewards for Completion
Delivering all 30 parts to the submarine enthusiast NPC "Captain Morrison" at his boathouse near the Vice City Marina enables him to partially restore the submarine, which then becomes a usable vehicle — the only submarine available in GTA 6. The Kosatka-class mini-sub can dive to the ocean floor, has a periscope view mode, and seats two players.
Milestone rewards: at 10 parts, Captain Morrison gives you a sonar upgrade for boats that highlights underwater points of interest. At 20 parts, he provides advanced scuba gear that doubles underwater breathing time. Each individual part delivered awards $2,000 cash.
Location Strategy
Tackle the deep-water parts first since they require the most preparation. Purchase scuba gear and rent or steal a boat capable of anchoring at dive sites. The 15 submerged parts are at depths ranging from 10 to 60 meters — the deepest requiring either the lung capacity upgrade or the advanced scuba gear awarded at 20 parts (use shoreline parts to reach 20 first).
Shoreline parts are visible as metallic debris — corroded metal plates, valve wheels, and instrument panels resting on sand, docks, and rocky outcrops. They contrast with the environment but can blend with other shoreline debris. The 5 indoor parts are in boat repair shops, maritime museum displays, and fishing supply stores where they've been repurposed as decor.
Completion Tips
Collect the 10 shoreline and 5 indoor parts first to unlock the sonar upgrade and advanced scuba gear before diving for the deep-water parts. This progression strategy ensures you have the best equipment for the most challenging underwater segments. The sonar upgrade reveals part locations on the minimap when boating within 50 meters.
The hardest parts include: #22 at 60-meter depth in a shipwreck in the deep channel east of Key Biscayne (requires max lung capacity or advanced scuba), #26 inside a partially collapsed underwater cave near Coral Reef Dive Site (tight navigation through narrow rock passages), and #29 welded to the underside of a Port Gellhorn cargo ship hull (must swim beneath the ship and interact while upside-down).
Tracking Your Progress
The reward ecosystem surrounding SUBMARINE PARTS provides incentives across multiple categories that collectively justify the time investment required for meaningful engagement. Economic returns compete favorably with alternative income sources for players whose skill levels enable efficient completion, while progression rewards contribute to broader advancement systems that unlock content across the game. Exclusive items available only through this content's progression track provide unique benefits unavailable through alternative channels.
Achievement and completion metrics associated with this content contribute to overall game completion percentages that track progress toward comprehensive engagement with GTA 6's content. Milestone rewards at specific progression thresholds provide punctuated reinforcement that maintains motivational momentum during longer progression arcs. The cumulative value of sustained engagement substantially exceeds what initial participation suggests, creating strong retention incentives for players who discover the deeper reward structures through committed participation.
Comparison to Other Collectibles
Submarine Parts have the most impactful completion reward — a functional submarine vehicle available nowhere else in the game. This makes them arguably the most valuable collectible set for players who want to explore the ocean floor comprehensively. The submarine opens up underwater areas that are otherwise only briefly accessible with scuba gear.
Like Movie Props, Submarine Parts require delivery to an NPC rather than simple collection. However, they don't need to be physically carried — touching a part automatically adds it to an inventory counter, and visiting Captain Morrison delivers all accumulated parts at once. This streamlined delivery is less tedious than the Movie Props' carrying mechanic.
Community Resources
Player community engagement with SUBMARINE PARTS reflects its effectiveness at generating discussion, creative response, and sustained participation within GTA 6's audience. Content creator coverage has produced guides, showcases, and analytical content that extends the element's visibility and accessibility beyond what organic discovery achieves independently. Community consensus positions this content within the broader quality assessment of GTA 6's offering, providing contextual evaluation that helps prospective participants assess the engagement's value against their available gaming time.
Community-generated resources including documentation, strategy guides, and discovery tracking tools enhance the engagement experience for players who supplement personal exploration with collective knowledge. The ongoing discovery of previously undocumented details demonstrates content density that continues yielding new findings beyond initial community exploration periods. Developer responsiveness to community feedback regarding this content indicates ongoing attention that may inform future adjustments through post-launch updates.
History in the GTA Series
Submarine Parts are directly inspired by GTA V's Spaceship Parts (50 parts delivered to Omega for a vehicle reward) and Submarine Pieces (30 pieces for a submersible). GTA 6 combines both concepts — the delivery-to-NPC structure of Spaceship Parts with the nautical theme of Submarine Pieces.
The Kosatka-class submarine as a reward is a callback to GTA Online's Cayo Perico Heist update, which introduced the Kosatka as a purchasable vehicle. GTA 6 makes the submarine earned rather than purchased, tying it to the collectible system as the game's most prestigious exploration reward.
FREQUENTLY ASKED QUESTIONS
How many parts are there?
There are 30 Submarine Parts — 15 underwater, 10 on shorelines, and 5 inside coastal buildings. They follow the trail of a fictional Cold War submarine wreck.
What's the reward for all 30?
Captain Morrison restores a functional Kosatka mini-submarine — the only submarine vehicle in GTA 6. It can dive to the ocean floor and seats two players. Earlier milestones grant sonar boat upgrades and advanced scuba gear.
Do I need scuba gear?
For the 15 underwater parts, yes. Tip: collect shoreline and indoor parts first to reach 20, which awards advanced scuba gear. This makes the deep-water dives significantly easier.
How deep do I need to dive?
Submerged parts range from 10 to 60 meters depth. The deepest parts require either maxed lung capacity or the advanced scuba gear milestone reward.
Can I deliver parts in batches?
Yes — touching a part adds it to your inventory automatically. Visit Captain Morrison at any time to deliver all accumulated parts at once. No carrying mechanic is required.