“Hook load” is defined as the load being lifted plus the weight of the slings and rigging. Hook load may or may not include the weight of the hook block and wire rope. This may be determined from the crane’s load rating chart. Examples of ways to determine load weight are: Weight indicators, scales, and shorebase weighing.
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards
The load being lifted, including the weight of all rigging..
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards