On cameras, you jump in from the side gates, about a 6 foot drop. Then they toss your camera and hope you can catch it before it sinks.
Well-maybe not.
They either lower the camera to you on a line with a quick disconnect clip or you float to the stern dive platform and they hand it to you. When you finish, they take it from you at the stern as usual.
BTW NEVER let them put it into the rinse tank. Tell them to put it either on the deck out of the way or on the camera table. Then you can rinse it as soon as you get clear of your dive gear. Many accidents/flooding happen when rigs bang together in the rinse tank as the boat rolls.
PS: When you do your 6 foot drop, bring your feet together before you hit the water and point the tips of your fins up. Makes for a more comfortable entry. Plus have enough air in your BC to pop back up if you want to retrieve a camera.