A system to inspect a tank containing a flammable fluid, comprising: a vehicle comprising a battery, a pressure switch, a control unit, a propeller, an inspection device, and a ranging device, wherein the control unit and battery are located within the vehicle; the pressure switch detecting when a pressure of the fluid external to the vehicle reaches a predetermined pressure threshold corresponding to a predetermined depth in the fluid, and responsive to detecting that the vehicle has reached the predetermined depth closing an electronic circuit between the control unit and the battery; the battery of the vehicle providing, responsive to closing of the electronic circuit by the pressure switch, power to the control unit, the propeller, the inspection device, and the ranging device; the control unit generating, based on data received from the ranging device, a map of the tank, and determining a first position of the vehicle on the map of the tank; the inspection device receiving, from the control unit responsive to identifying the first position of the vehicle on the map of the tank based on data from the ranging device, a command to initiate inspection at the first position on the map; the inspection device, responsive to the command to initiate inspection, detecting values at a portion of the tank corresponding to the first position on the map; the inspection device providing, to the control unit, data comprising the detected values; the control unit determining a quality metric based upon the detected values at the portion of the tank corresponding to the first position of the vehicle on the map, and storing, in a memory of the vehicle, the quality metric; and the propeller of the vehicle moving, responsive to a second command from the control unit, the vehicle through the flammable fluid in the tank towards a second position on the map. a vehicle comprising a battery, a pressure switch, a control unit, a propeller, an inspection device, and a ranging device, wherein the control unit and battery are located within the vehicle; the pressure switch detecting when a pressure of the fluid external to the vehicle reaches a predetermined pressure threshold corresponding to a predetermined depth in the fluid, and responsive to detecting that the vehicle has reached the predetermined depth closing an electronic circuit between the control unit and the battery; the battery of the vehicle providing, responsive to closing of the electronic circuit by the pressure switch, power to the control unit, the propeller, the inspection device, and the ranging device; the control unit generating, based on data received from the ranging device, a map of the tank, and determining a first position of the vehicle on the map of the tank; the inspection device receiving, from the control unit responsive to identifying the first position of the vehicle on the map of the tank based on data from the ranging device, a command to initiate inspection at the first position on the map; the inspection device, responsive to the command to initiate inspection, detecting values at a portion of the tank corresponding to the first position on the map; the inspection device providing, to the control unit, data comprising the detected values; the control unit determining a quality metric based upon the detected values at the portion of the tank corresponding to the first position of the vehicle on the map, and storing, in a memory of the vehicle, the quality metric; and the propeller of the vehicle moving, responsive to a second command from the control unit, the vehicle through the flammable fluid in the tank towards a second position on the map.