What equipment is always secured in the Diver Down bill?

In the context of diving operations and safety protocols, the Diver Down bill is crucial for ensuring that all equipment that may interfere with dive operations is secured. The correct set of equipment to be always secured in this bill includes the bow thruster, fire pump #1, and the degaussing system.

The bow thruster can create turbulence in the water, which may be hazardous to divers below the surface. Securing it helps to maintain a safer diving environment. Fire pump #1 is typically kept secured to prevent any unintended discharge or water movement, which could endanger divers. The degaussing system, which mitigates magnetic signatures to deter mines, needs to be secured as its operation could also disturb the surrounding water and compromise the safety of divers.

Understanding these equipment's roles reinforces the need for a controlled and safe environment during diving operations, highlighting the importance of the Diver Down bill in safeguarding divers and ensuring their work can proceed without external disturbances.