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Shipwrecks and other objects on the seafloor can be a danger to navigation at sea, as they may be located in very shallow water or have objects such as a ship mast standing upright. These objects can be unsafe to boats and ships sailing at sea. Knowing the position of shipwrecks helps us to make sure we can safely navigate them. Shipwrecks are mapped on the UK Hydrographic Office Admiralty charts.

Shipwrecks are also a very important part of maritime history. Many of the shipwrecks relate to World War I and World War II and some date back to the Spanish Armada. Knowing the location of these shipwrecks helps archaeologists to protect them. All shipwrecks over 100 years old are protected by laws that means you have to get a license to dive them.