Standard Issue Personel - Mobile Field Bunk
From Halopedia, the Halo wiki
File:FieldBunk.jpg
Bunks in the barracks area of Crows Nest Military Base.
A Field Bunk is a pad for Marines to sleep on in conditions that are not UNSC standard. In other words, a Field Bunk is a makeshift bed during war times when actual beds are not available.
