Which of the following aircraft does NOT use a "jaw lock" tow bar?

The B737 is the correct choice because this aircraft uses a different system for towing rather than the "jaw lock" tow bar. The "jaw lock" tow bar is typically used with certain types of aircraft that require a specific connection for safe and secure towing, mainly those that have a towing mechanism that complements such a design.

In contrast, the B737 is designed with a unique tow bar connection method that differs from the jaw lock system. Understanding the towing mechanisms of different aircraft is crucial for ramp agents, as using the correct tow bar ensures safety during ground operations and effective handling of the aircraft. Recognizing the specific requirements for each aircraft type allows for smoother operations on the ramp, aligning with the standard procedures outlined in training.