Aviation gasoline. Gasoline fuel for reciprocating piston engine helicopters, also known as avgas.

Cargo hook. A device attached to a helicopter that is used to hold suspended loads.

Competent person. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.

Deadman controls. A control, switch or device that will automatically shut off whenever the operator releases it.

Deposit area. An area that is designated for dropping off and picking up suspended loads.

Downwash. The wind created by the rotating blades of a helicopter.

Ground device. A device used to dissipate the static electricity charge that has built up on a suspended load.

Helicopter crane. A helicopter that carries cargo or equipment suspended underneath it.

Jet B type fuel. A blend of gasoline and kerosene fuel.

Powered hoist. A powered device designed to lift and lower equipment and cargo.

Tag line. A line or rope used to control suspended loads that can swing freely.