Power budget/usage

The Otter is battery powered, constraining the duration of missions it can perform. A power budget is given in the table below, showing the worst-case power usage for each component. The total capacity of the four batteries is 3660Wh, resulting in a worst-case duration of battery operation of 3660W h/826.762W= 4.427h. As can be seen in the table, the motors dominate power consumption, and actuation should therefore be limited for long duration missions. Note that the power usage of the hydrophone is based on the TBR700 battery usage of 6 mA at 3.6 V, and the TBR700RT may use a some small amount more.