Sonar Collections Dock

Sonar Collections Dock is a purchasable dock in Grand Theft Auto V. It is located in Paleto Cove, Blaine County, and is one way to obtain a Submarine. The dock costs $250,000 to buy, and finds nuclear waste in waters around the map. Each nuclear waste found generates $23,000 income for the player. There are 30 of them all around the island. If you wish to collect them all, it is suggested to do it all at the same time, and it takes between 1h30 and 2h to complete.

There is no barrel in the canals.

Also, there is a stranger, Abigail, who will appear soon after you purchase the dock and will give you a mission to collect 30 pieces of submarine wreck. This time you will be using the raft and scuba diving equipement. The reward for this mission is $10, but among the wrecks, you will find many treasures. The raft is much quicker than the submarine.