Table 4.

Popular UUVs, types of sensors installed, dimensions of the UUVs, and maximum endurance and depths underwater are provided. All the UUVs provided here are autonomous and are used for deepwater and seafloor imaging/mapping and oceanography research.

Sr. #	UUAV Name	Powered by and Sensors Installed	Dimensions, Endurance and Depth
1	MBARI’s Dorado-class	Battery, 200 kHz multibeam sonar, 100 kHz and 410 kHz chirp sidescan sonars	0.5 m diameter, 6.4 m length, 20 h endurance, 6 km depth
2	Sentry	Battery, conductivity, temperature and depth sensors, digital camera, reodx potential probe	1.8 m height, 2.2 m width, 2.9 m length, 24 h endurance, 6 km depth
3	Qianlong-1	Battery, camera, obstacle avoidance sonar, side-scan sonar	0.8 m diameter, 4.6 m length, 24 h endurance, 6 km depth
4	SeaBED Class	Battery, Imagenex Delta-T imaging sonar, camera	2 m length, 1.5 m height, 1.2 m width, 24 h endurance, depth 5 km
5	Urashima (hybrid)	Battery, multi-beam echo sounder, Niskin water sampler, interferometric synthetic aperture sonar, gravimeter system	1.3 m width, 10 m length, 24 h endurance, depth 3.5 km
6	Aster x/Idef x	Battery, multi-beam echo sounders, multiple sensors, sub-bottom profilers, spectrometers	0.7 m diameter, 4.5 m length, 16 h endurance, depth 3 km
7	BlueROV2	Battery, gyroscope, accelerometer, magnetometer, pressure/depth and temperature sensor	457 mm × 338 mm × 254 mm, 4.5 m, 4 h endurance, depth 300 m