The detonation of the Able bomb occurred 490 yards (450 m) above and slightly to starboard of Sakawa's stern. The blast caused Sakawa to burn fiercely for twenty-four hours; the force crushed her superstructure, damaged her hull and breached her stern. After the test, a tug boat, USS Achomawi, tried to tow Sakawa toward a beach to prevent the latter ship from sinking, but failed. Sakawa started sinking almost as soon as towing began, and, with a tow cable connecting the two ships, Achomawi started to be dragged down, too. After a number of attempts, sailors cut the tow cable with an acetylene torch. Sakawa sank on 2 July 1946 in about 200 feet (60 m) of water, with a portion of the tow cable still attached.

The second weapons test, Baker, was an underwater shot about 500 feet (150 m) away from the sunken Sakawa.

--Wikipedia, Japanese Cruiser Sakawa
https://en.wikipedia.org/wiki/Japanese_cruiser_Sakawa#Post-war_operations