From aerial survey to zoology, Part I of this two-part encyclopedia covers all aspects of underwater archeology, treasure hunting and salvaging. For example, entries are included for different types of artifacts, notable treasure hunters, the various salvaging equipment, and techniques in mapping and excavating.

Part II covers the shipwrecks themselves, dividing them into 13 geographical categories. Beginning with the northernmost category (Canada) and ending with the southernmost (South America), every known shipwreck--both identified and unidentified--receives an entry in alphabetical order under its appropriate geographical category. Entries are by name, such as Andrea Gail, Titanic, and Queen Ann's Revenge. Unidentified is used when a shipwreck's name remains unknown. Entries give the nationality (e.g., Spanish, British, American), type (schooner, frigate, brig are three), function (examples: slave transportation, piracy, fishing), location and history of the shipwreck.