"STEEL,SECTION OF ELEVATED WALKWAY FOR CONTROLING DRYDOCK OPERATIONS,ASSEMBLED FROM THE FOLLOWING,2 EA BEAM,CATWALK /SHORT/,MARK NO. DS-6,4 EA BRACKET,CATWALK BEAM,MARK NO. DS-16,2 EA PANEL,CATWALK,MARK NO.DS-3,12 EA BOLT,HOOK,MARK NO. DS-18,USED FOR MAKING VESSEL HULL REPAIRSNAVFAC DWG 816468 /SHORT/,MARK NO. DS-9"