Rescue diver suit

The rescue diver suit  is a unique armor set in the Fallout 4 add-on Far Harbor.

Gameplay
The armor offers 10 ballistic resistance, 10 energy resistance and 250 radiation resistance, and allows the wearer to breathe underwater indefinitely. Despite its heavy appearance, anyone wearing the diver suit can swim normally as with all non-power armor attire.

Location
Obtained from Captain Avery as a reward for completing the quest The Changing Tide.