NAVSEA SS521-AH-PRO-010 (REVISION 1), TECHNICAL MANUAL U.S. NAVY DIVING UMBILICAL (UBA MK 20 AND MK 21)

NAVSEA SS521-AH-PRO-010 (REVISION 1), (0910-LP-103-2583) TECHNICAL MANUAL U.S. NAVY DIVING UMBILICAL (UBA MK 20 AND MK 21). This manual is promulgated to provide definitive guidance in the production of diving umbilicals. Its use by U.S. Navy diving activities is mandatory.