GJB 6850.131-2009 Surface ship mooring and sailing test procedures part 131: Azimuth level test has been changed from GJB 524.59-1988 Procedure for mooring and sailing test of speedboats (planing boats) azimuth level test.
GJB 6850.131-2009 Surface ship mooring and sailing test procedures part 131: Azimuth level test has been changed from GJB 350.60-1987 Surface combat ship mooring and navigation test procedures azimuth level test.
GJB 6850.131-2009 Surface ship mooring and sailing test procedures part 131: Azimuth level test has been changed from GJB 164.62-1986 Landing ship mooring and navigation test procedures Azimuth level test.
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