Which hook is connected to the aft towing pad with a shackle?

The pelican hook is specifically designed to connect to the aft towing pad using a shackle, providing a secure attachment point. This type of hook features a locking mechanism that ensures that the hook remains securely closed when under load, making it an ideal choice for towing applications. The design allows for easy attachment and detachment, which is important in operations where quick adjustments are needed.

In contrast, other types of hooks, like snap or eye hooks, typically serve different functions or have alternate connection methods that do not ensure the same level of safety and ease of use for towing applications. J-hooks, while useful for specific applications, are not intended for the same secure tow connections as pelican hooks. The pelican hook's locking feature and structure are uniquely suited to withstand the stresses involved in towing while ensuring that the connection remains intact throughout the operation.