It depends on what sort of accident you're talking about. In a car accident, for example, you'd want to turn off your car first thing in case of fire.
in my opinion you should tell the teacher immediately
Report it to someone in authority.
Check to see if there are any casulties
stop and give whatever assistance is necessary
The FIRST thing they will always do is check for injuries - after that their duties will depend on the requirements of the incident.
The first thing to do - is raise the alarm. Whether that's activating a fire alarm - or reporting an accident to a tutor.
The first thing you should do is call the police so they can respond to the site of the accident and write a report. They can also make certain everyone involved is licensed and insured.
If you have been involved in a car accident, the first thing that you should do is contact 911 if there have been any injuries, so that you can get medical attention. After that, you should make sure to take notes of what happened and photos if possible. You should also get the contact information for anyone involved in the accident, and report the accident to your insurance company.
inform them
inform them
It should be recorded in the log and reported to the harbourmaster at the next port of call,if the accident was seen by another boat who could not stop or radio for some reason he may report it when he enters port and waste rescue crews or coastguards time looking for a victim,its a courtesy thing.