Every day when being used, whether or not there are other passengers. Boats should have minimal Coast Guard required equipment on board (life vests, fire extinguishers, ropes, etc).
An operator of a pleasure vessel should not moor to a signal buoy or other seamark used for navigation, as these are intended to aid in safe navigation and should remain unobstructed. Mooring to such devices can create hazards for other vessels and interfere with their navigational aids. In emergencies or under specific circumstances where safety is at risk, temporary mooring may be necessary, but it should be avoided whenever possible and done in accordance with local regulations. Always check local laws and guidelines for specific rules regarding mooring practices.
If the fuse is working, then check the bulbs.
Check fuse box. Your operator manual should show all fuses, their location, and what they protect.
The first safety precaution a boat operator should take is to ensure that all passengers are equipped with properly fitting life jackets. Additionally, the operator should conduct a safety briefing to inform everyone about emergency procedures, the location of safety equipment, and the importance of staying seated while the boat is in motion. It's also important to check weather conditions and ensure that the boat is in good working order before setting out.
Check the operator's manual, if you have one. It should tell you in there.
check they have water
The operator
Check your warranty
the coolant level
After you have been working in the engine compartment.
To determine if an operator is Hermitian, one must check if the operator is equal to its own conjugate transpose. This means that the operator's adjoint is equal to the operator itself. If this condition is met, then the operator is Hermitian.
check the fuse.