Death at Sea

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Death at Sea
Abigail Mathers and Michael De Santa meeting.

Abigail Mathers and Michael De Santa meeting.
Game GTA V
Protagonist Michael De Santa
For Abigail Mathers
Objective Collect 50 Submarine Parts
Location Sonar Collections Dock in Paleto Cove, Blaine County
Unlocks What Lies Beneath
Unlocked by Purchasing Sonar Collections Dock
(available after Blitz Play)

Death at Sea is a mission in Grand Theft Auto V given to protagonist Michael De Santa by Abigail Mathers from the Sonar Collections Dock in Paleto Cove, Blaine County.


Michael De Santa, while at the Sonar Collections Dock, will meet Abigail Mathers, the widow of environmentalist and television producer Frank Mathers. She explains that Frank died when his submarine began to fall apart while underwater and asks Michael to collect the pieces, which are scattered across the Pacific Ocean surrounding San Andreas. She needs the parts as she can not claim on Frank's life insurance as the insurance company believe the submarine had been tampered with. She provides Michael with a Dinghy, with a sonar to find the broken parts and some scuba diving equipment. The player can then collect the parts as Michael, Franklin Clinton or Trevor Philips.


(As Michael approaches Abigail)

Abigail Mathers: Can you help me?

(Michael walks closer to Abigail)

Michael De Santa: Hello.

Abigail Mathers: Hello. Thank god you stopped. Were you a fan of Frank Mathers?

Michael De Santa: Frank Mathers, the TV guy who used to do the shows about space until he became obsessed with undersea exploration? No. Not a huge fan.

Abigail Mathers: Frank was my husband.

Michael De Santa: By not a huge fan I mean... not a huge fan as much as a fanatic.

Abigail Mathers: He was a cruel and heartless man.

Michael De Santa: Well like I said, I was not a huge fan.

Abigail Mathers: But I loved him.

Michael De Santa: Didn't he leave his sick wife and five kids to run off with you?

Abigail Mathers: We loved each other.

Michael De Santa: I'm sure you did.

Abigail Mathers: And I'm penniless... Now... a lot more or-or less. Well, Frank's submarine broke apart while he was trying to save the San Andreas white shark. But his body was never found.

Michael De Santa: You know, people thought someone tampered with the airlock(s).

Abigail Mathers: That's an outright lie. That was never proven. I love Frank and... Frank loved me, which is why we invested so much money in life insurance. If we could just prove that Frank was dead and that the airlocks weren't tampered with. I would sleep so much easier.

Michael De Santa: I bet you would.

(Michael begins to walk away)

Abigail Mathers: I'll make it very worth your while.

(Michael looks back at Abigail)

Michael De Santa: Guess I could take a look.


The reward for completing the mission is the ability to collect all thirty submarine parts, which unlocks What Lies Beneath. Abigail Mathers also becomes a contact for Michael.


  • The in-game name of the mission is What Lies Beneath, which is the mission unlocked after collecting the submarine parts. The name of the mission can only be found at the Rockstar Games Social Club.
  • The player should watch out for sharks while collecting the submarine parts.


Video walkthrough

Xbox 360 Version - GTASeriesVideos
2 minutes and 3 seconds in