You know, there is this expression: "Do not try this on your own!"... If you are a boat owner and experience a problem at sea, do not try fixing it on your own by going into the water. Because in such cases, you require a commercial diver.
Yüksel Erkorkmaz, Setur Marinas Yalova, Professional Commercial Diver

Sometimes we wander off on the boat, and the next thing we know we are on a rock. Sometimes others wander off and cause you damage. Sometimes there is a problem when mooring, sometimes when drifting. A valuable item falling into the water is not less of an issue either. Such cases require commercial divers. Because unlike sport diving, these types of divers have much more qualifications and knowledge than just the ability to stay underwater. They know the sea, they know boating, they have technical and mechanical knowledge and are used to complications. Only these types of divers are licensed to dive without a buddy. They are also well aware of risks such as shallow water blackout.

Do not hesitate to call a commercial diver, especially in the following situations:

Photographs: Unsplash – Mitchel Wijt, Thant Aung, Vladislav Osterman, Bostan Florin Catalin