USS Grapple (ARS-7) is a Diver-class rescue and salvage ship commissioned in the United States Navy from 1943 to 1946 and from 1951 to 1977. In 1977, she was sold to Taiwan and was renamed ROCS Da Hu (ARS-552).

Rescue and salvage ships are a type of military salvage tug. They are tasked with coming to the aid of stricken vessels. Their general mission capabilities include combat salvage, lifting, towing, retraction of grounded vessels, off-ship firefighting, and manned diving operations. They were common during World War II.