The Teledyne Gavia Autonomous Underwater Vehicle (AUV)’s modularity and versatility makes it easily reconfigurable to meet a wide range of subsea requirements. The corresponding survey data, such as CTD, seafloor image and seafloor geomorphology, can be acquired by carrying different tool modules. The working depth is rated to 1000m with working time up to 7-8 hours. The battery can be exchanged on site to improve the working capacity.