Buoy

Buoys along the Point Lookout coastline mark the location of hidden containers in the waters. Buoys are easily located in the fog due to their bells. The actual caches are found underwater, directly below the buoys. As you search, keep an eye on the oxygen gauge or keep stimpaks at the ready.

Locations
The buoys are numbered consecutively, going clockwise around the map, starting in the northeast corner.

Buoy 1
East of Coastal Grotto.
 * 1 safe (locked-very easy)
 * 1 first aid box
 * 4 metal boxes
 * 1 footlocker

Buoy 2
Southeast of Coastal Grotto.
 * T-Rex bones
 * 1 safe (locked-average)
 * 1 lever-action rifle
 * 2 ammunition boxes

Buoy 3
Northeast of USS Ozymandias.
 * 1 safe (locked-very easy)
 * 1 first aid box
 * 1 stimpak
 * 1 desk
 * 3 metal boxes

Buoy 4
South of USS Ozymandias.
 * 1 footlocker
 * 1 safe (locked-very easy)
 * 2 ammunition boxes (1 locked-easy)
 * 1 refrigerator

Buoy 5
Southeast of Calvert Mansion, Northeast of the Lighthouse.
 * 1 trunk
 * 1 safe (locked-very easy)
 * 3 metal boxes
 * 1 first aid box (locked-easy)
 * A lot of railway spikes
 * 1 camera

Buoy 6
East of Sub Recovery Site, West of the Lighthouse. Halfway between them.
 * 1 safe (locked-average)
 * 1 ammunition box (locked-very easy)
 * Lockers
 * 1 first aid box
 * 1 suitcase

Buoy 7
Northwest of Sub Recovery Site.
 * 1 gun cabinet (locked-easy)
 * 3 metal boxes
 * 1 first aid box
 * 1 footlocker (locked-very easy)

Buoy 8
Directly south of the Duchess Gambit.
 * 1 safe (locked-average)
 * 1 lawn mower
 * 2 ammunition boxes (1 unlocked other has very easy lock)
 * A mini nuke under a half buried basket (directly in front of the lawn mower)
 * 1 footlocker

Buoy 9
Southeast of the Disaster Relief Outpost (washed ashore and partially covered by sand).
 * 1 safe (locked-very easy)

Buoy 10
South of Dove Delta
 * 1 trunk
 * 1 safe (locked-easy)

Additional Submerged Treasure
South of the Disaster relief outpost, on a ship beneath the water.
 * 1 safe (locked-very easy)

East of Buoy 9, southeast of the Disaster relief outpost, in the cabin of the stranded ship.
 * 1 safe (locked-easy)

North of USS Ozymandias, spilling out of an underwater crack in the hull of a half-submerged shipwreck.
 * 3 Jets
 * 3 Mentats
 * 1 Buffout
 * 4 stimpaks

Appearances
Buoys appear only in the Fallout 3 add-on Point Lookout.