bale capacity

Their holds are called bale capacity or bale cubic.

Bale Cube (or Bale Capacity)- The space available for cargo measured in cubic feet to the inside of the cargo battens, on the frames, and to the underside of the beams.

Flexible response, stowage diagrams, cubic bale capacity, palletized load units, capstan shackles, arbitration clauses, lists and demands, memos and cries for judgment--his mind spun with it all as he looked out at all those ships.