Setup: Submarine Recon

Setup: Submarine Recon is a heist setup featured in Grand Theft Auto Online as part of the Doomsday Heist update. It is part of the Act 2 of The Doomsday Heist.

Description
The crew are instructed by Lester to get into their Strombergs and start the recon mission on the submarine, but before, they have another objective to do.

The first part is to move to North Chumash and take the sub's resupply convoy, consisting of four Brickade trucks, two Insurgent Pick-Up armed trucks and three Buzzard Attack Choppers.

Once the convoy is destroyed, the crew heads to Paleto Bay while defeating enemies in Nightshark SUVs, but Lester informs he detected a network of sea mines around the vessel, so the crew have to get into the sea and destroy the ten mines with the torpedoes.

After destroying the mines, the crew are now instructed by Avon to scan the wreckage of a spy plane they lost the other day, so they can determine which weapon they used. A red scanning projection comes from the front end of the Strombergs to indicate it is scanning, so everyone have to scan the wreckage and then the submarine.

After getting the necessary data, the crew have to leave the submarine and deliver it to a drop-off point on Paleto Bay, on the parking lot of the Ammu-Nation store to complete the mission.