Table 3-1. Compartment Letters for Ships
Letter
Type of Compartment
Examples
A
Stowage spaces
Store and issue rooms; refrigerated compartments
AA
Cargo holds
Cargo holds and cargo refrigerated compartments
C
Control centers for ship and fire-control
CIC; plotting rooms; communications centers; pilot
operations (normally manned)
house; electronic equipment operating spaces; IC
rooms
E
Engineering control centers (normally
Main machinery spaces; evaporator rooms; steering gear
manned)
rooms; pump rooms; auxiliary machinery spaces;
emergency generator rooms
F
Oil stowage compartments (ship use)
Fuel- , diesel- , and lubricating-oil compartments
FF
Oil stowage compartments (cargo)
Compartments carrying various types of oil as cargo
G
Gasoline stowage compartments (ship use)
Gasoline tanks, cofferdams, trunks, and pump rooms
GG
Gasoline stowage compartments (cargo)
Spaces for carrying gasoline as cargo
J
JP-5 fuel (ship use)
Jet fuel stowage spaces
JJ
JP-5 fuel (cargo)
Spaces for carrying JP-5 fuel as cargo
K
Chemicals and dangerous materials (other
Chemicals, semisafe materials, and dangerous materials
than oil and gasoline)
carried as cargo or for ship's use
L
Living spaces
Berthing and messing spaces; staterooms; washrooms;
heads; brig; sick bay; and passageways
M
Ammunition spaces
Magazines; handling rooms; turrets; gun mounts; shell
rooms; ready service rooms
Q
Miscellaneous spaces not covered by other
Laundry; galley; pantries; wiring trunks; unmanned
letters
engineering; electrical and electronic spaces; shops;
offices
T
Vertical access trunks
Escape trunks
V
Voids
Cofferdam spaces (other than gasoline); void wing
compartments
W
Water stowage spaces
Drainage tanks; freshwater tanks; reserve feedwater
tanks
3-6
