The coastal hideout is an unmarked location in the Commonwealth in 2287. The area is located southwest of Mahkra Fishpacking, the entrance is a door under a bridge close to an area where a mirelurk queen spawns. The hideout is hidden under a bridge in a similar style as the shelter in Fallout 3.
The room inside resembles a small shelter room or storage area, with multiple skeletons and random loot, along with a power generator containing a fusion core. Beware, though, as the room furthest away from the entrance has very high radiation levels, and several feral ghouls spawn in the area (potentially including a glowing one).
- Fusion core, in the generator in the first room.
- Vault-Tec lunchbox, in a small cell behind a door with a novice lock.