What are the three most common devices used in hoist operations?

The correct answer highlights three specialized devices utilized in hoist operations, particularly within search and rescue contexts.

The sked, jungle penetrator, and stokes basket are all specifically designed for the safe transport of individuals in various challenging environments. The sked is a flexible, lightweight rescue sled that can easily maneuver over rough terrain and can be used in water. The jungle penetrator is designed for quick pickup and transport of personnel from densely vegetated or remote locations, integrating a harness system that allows for secure attachment to helicopters. Lastly, the stokes basket provides a rigid structure that can securely carry a patient and is typically used for transporting injured individuals in a rescue scenario, ensuring stability and safety during the hoist operation.

The other options do not focus on devices that are specifically designed for hoisting operations, as indicated in the question.