The main hoist rope.
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Load Line (also known as Hoist Line)
In lifting crane service it refers to the main hoist rope. The secondary hoist rope is referred to as a whip line or auxiliary line.
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards