Which of the following is NOT a general type of parachute loft in use?

The correct choice identifies Airborne parachute loft as not being a general type of parachute loft currently in use. The available types of parachute lofts, such as shore-based, shipboard, and mobile, are all established concepts related to the storage, maintenance, and preparation of parachutes for use in various operational environments.

Shore-based parachute lofts are typically located at land facilities where parachutes can be packed and maintained in a controlled environment. Shipboard parachute lofts are similar but are specifically designed to operate on naval vessels, accommodating the unique conditions and requirements of being at sea. Mobile parachute lofts refer to portable setups that can be transported to different locations as needed, allowing for flexibility in parachute operations.

In contrast, the term "Airborne parachute loft" does not reflect a standard type of loft used for parachute operations. Instead, the concept of airborne relates to the act of parachuting itself, which occurs once the parachute has been deployed and the jumper is in freefall or descending. Thus, selecting airborne parachute loft highlights a misunderstanding of the terminology related to parachute storage and maintenance operations.