This specification covers the principal dimensions and materials of closed chocks for installation on ships used for mooring. It specifies the classification of chocks, their dimension requirements, and strength requirements. It also demonstrates the proper horizontal and vertical loading for Type A and Type B chocks.

1.1 This specification covers the principal dimensions and materials of closed chocks for installation on ships used for mooring.

1.2 Chocks can be used with either wire rope or fiber and synthetic ropes.

1.3 Chocks are for mounting directly on a deck, seat (foundation), or for mounting in a bulwark.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.