Watch these guides to master the submarine combat and optimize your payout runs:
Infiltrate a dark hangar at Los Santos International Airport to steal the Avenger aircraft while fighting off waves of mercenaries. GTA Don 2
Enters the sub, interrogates Bogdan, and inserts a virus into the system. Pro tip: Use an Assault Shotgun and First-Person view for the tight corridors. Watch these guides to master the submarine combat
Circles the submarine's location to take out incoming buzzards. To make this easier, you can land the Avenger on the beach and use a Sea Shark to wait for your partner, effectively avoiding most enemy fire. GTA Don 2
Use a RCV (Riot Control Van) to extinguish fires and recover data from burning vans while under heavy fire.