This is one of the setup missions for the Merryweather Heist, Trevor goes to the Port of Los Santos and steals a submarine so that he can use it to steal a nuclear super weapon from Merryweather. Once he steals the submarine, he drives it to the drop off point where Floyd uses a crane to lift it out of the water and onto a truck.
From there, Trevor drives the truck with the submarine to the warehouse to store it until the heist is ready to go.
Gold Medal Objectives
- Time – Complete within 08:30.
- No Boarding – Steal the Submersible without boarding the boat.