The electronics on the COACH enabled the user to input commands to the TOWRP and receive status messages from the TOWRP. Inputs included rotation via the steering wheel using a rotary encoder, velocity via the throttle using a potentiometer, jettison the crew via the life ring using a push-button, assert command via a push-button, suppress mutiny via the ship bell using a microphone, free digital command via a push-button, free analog command via a push-button and a potentiometer for the magnitude, and a switch to indicate whether this COACH was working for the blue or red teams. Outputs included two seven-segment displays for displaying TOWRP numbers and morale values, a lamp to indicate a mutiny in progress, an LED to indicate that the COACH was not controlling a TOWRP, two LEDs to indicate the current team for which the COACH was playing (red or blue), and speakers to play a clip from the song “Mississippi Queen” upon every successful assertion of command. In addition to these I/O functions, an XBee radio board enabled the wireless communication between the COACH and the TOWRP, and a power board regulated and supplied power to all of the other boards. Each of the circuits required to provide this functionality is described in the following subsections.