Florida Hull Cleaner Killed On The Job

[KeithG]

When I worked in a steel mill every electrical breaker had a physical lockout mount on it. Any time maintenance was being performed on equipment a personal pad lock was attached to the circuit breaker to prevent it from being turned on. Only the person who put the lock on had a key for it.

and wikipedia does a better job of explaining lockouts than i did...
Lockout-tagout - Wikipedia

 

[Akimbo]

It is complicated since not everything that can injure a diver is electrically powered or controlled. Most circuit breaker panels can be locked but engines often have 24vdc or pneumatic starters. Thrusters and windlasses can be AC, DC, or hydraulic. Some can be powered off shore power instead of just generators.

You really need the help of someone who knows the all systems onboard and appreciates the safety of divers more than the convenience of the owners, clients, and cooks. That can be a large order when the HVAC and refrigeration systems have to be shut down.