Cato Island 23°15′S 155°32′E, is a small oval-shaped island lying about
approximately 375 km east of Gladstone, Queensland and about 270 km
east-southeast of the southern end of the Great Barrier Reef. Cato Reef, a part of the Cato Bank, is an area in the Coral Sea off the northeastern coast of Queensland, Australia that is of approximately 21 km by 13 km of this 200 km2 area, where depth of water is typically less than 17 m. Upon Cato Bank Cato Reef encircles an area of 3.3 km by 1.8 km, area 5 km2 including a small shallow lagoon which contains Cato Island, a low-relief cay in the west that is approximately 650 by 300 m, area 15 hectares, 6 m high. Close to the southeast corner of Cato Bank is Hutchison Rock, with 1 m depth over it