Abstract: A modular submersible survey vehicle (“MSSV”) that includes a pair of continuous tracks, a chassis, a shell and a plurality of watertight modules. The MSSV can also include a mast with a mast topper, and a remote control device. A chassis is mounted on the pair of continuous tracks and covered by the shell on the sides and top but open on the bottom. The watertight modules are mounted on the chassis and contain mechanical devices and electronic components for locomotion, controlling movement of the MSSV, surveying and wireless communication. The mast topper can support a radio antenna, a global positioning antenna, a WiFi an antenna, a light and/or a camera. The remote control device is used to control the MSSV from a remote location. The shell is vented so that water freely passes into and out of the shell through the open bottom of the chassis.