"EWOOD TIMBERS,V-SHAPED PONTOON DRYDOCK FRAME,ADJUSTABLE TO HULL OFVESSEL TO BE DOCKED,CONSIST OF 1 EA BLOCKING FRAME UPPER MEMBER MARK NO.DB-2,1 EA BLOCKING FRAME LOWER MEMBER MARK NO. DB-4,1 EA FRAME SUPPORTADJUSTABLE MARK NO. DB-3,HINGED AT ONE END TO HOLD UPPER AND LOWER FRAMEAT PROPER ANGLE,3 EA BOLT HEX 1 IN. DIA,3-1/2 IN. LG,1 EA BOLT HEX 1 IN.DIA,5 IN. LG,4 EA NUT 1 IN. THD TO FIT,USED FOR P-SERIES PONTOON DRYDOCK,NAVFAC DWG 816464 MARK NO. DB"