Linked from
The 15 pages that link to Underwater archaeology, each with the reason it gives.
HydrographyRelated: Seabed mapping can locate and document archaeological sites and shipwrecks.
Cave divingRelated: Submerged caves can preserve artifacts and human remains beyond ordinary access.
ShipwreckNarrower topic: It uses wreck sites to reconstruct shipbuilding, trade, and life at sea.
Sahul ShelfRelated: It offers methods for investigating drowned sites on the former shelf.