The University of Hawaii at Manoa’s School of Ocean Earth Science and Technology completed a three-year long investigation of Sea Disposal Site Hawaii Number 5, a deep-water military munitions disposal site in US coastal waters approximately 5 miles south of Pearl Harbor, Oahu, Hawaii. This complex investigation required the use of high-resolution sidescan sonar and remotely operated underwater vehicles to locate sea disposed munitions in water as deep as 1,500 feet.