There are a number of variants of the REMUS; all are torpedo-shaped vessels with reconfigurable sensors.
REMUS 6000 The largest model is the REMUS 6000 at long and in diameter; it is named after its maximum diving depth of 6000m. It can travel at speeds of up to and has an endurance of up to 22 hours. In 2018 the
Japan Agency for Marine-Earth Science and Technology (JAMSTEC) received an order of New Generation REMUS 6000 AUVs. The New Generation REMUS 6000 is based on the legacy REMUS 6000 platform with "a modular architecture that allows for the addition of multiple payloads including customer sensor packages, forward fins and additional battery sections.” Hydroid also claims that the New Generation model has increased endurance.
REMUS 620 In November 2022, the development of the REMUS 620 was announced. It is an enhanced version of the REMUS 300, built to the same size as the REMUS 600. It has a battery endurance of up to 110 hours and a range of up to , depending on installed modules, and a sprint speed of . With a
synthetic-aperture sonar installed, battery life is reduced to 78 hours with a range of . Design missions include mine countermeasures, hydrographic surveys, intelligence collection, surveillance, cyber warfare and electronic warfare. It can also launch smaller
UUVs or
UAVs. It can be launched from submarines, surface ships, small manned or unmanned craft, and helicopters. It can be recovered underwater by submarines, and recovery back into torpedo tubes is being developed at Woods Hole.
REMUS 600 The midsized REMUS 600 was previously known as the REMUS 12.75, so called due to its diameter. It was renamed to the 600 to correspond to the maximum depth at which it can operate (600m). It can travel at speeds of up to and has an endurance of up to 70 hours at its standard cruising speed of . The Mk 18 Mod 2 is equipped with side-scan
sonar, a downward-looking video camera,
ADCP,
GPS, beam attenuation meter (BAM) to measure
turbidity, and a conductivity temperature depth (CTD) sensor. A total of 175 REMUS 600s were delivered to customers in the United States, United Kingdom, Australia and Japan. It is designed for mine countermeasures, search and recovery, rapid environmental assessment, hydrographic survey, anti-submarine warfare, and
intelligence, surveillance and reconnaissance. It has civil applications in the fields of marine archaeology, renewables, and offshore oil and gas. As of 2024, the system was also being adopted by the
Royal Navy's Mine and Threat Exploitation Group.
REMUS 100 The REMUS 100 takes its name from its max operating depth of 100 meters. It can travel at speeds of up to and has an endurance of up to 22 hours at its standard cruising speed of . ==Operational history==