An electronic control unit may, based on received sensor data, automatically direct the operation of a reel assembly for deploying a cable, hose or umbilical connection. The electronic control unit may operate in conjunction with an electro-pneumatic drive to control the reel assembly. Sensors may measure various parameters, such as a measured line tension and/or a length of cable, hose or umbilical connection that has been deployed, and transmit the measured data to the electronic control unit. Optionally, the sensor data and/or user control inputs and system status information may be logged. The system also may use this data to control the system, such as by activating an alarm when a certain alarm limit is exceeded by the data, adjusting the pressure or other parameters of the electro-pneumatic drive, and the like. The system also may generate a visual notification for an operator when an alarm is triggered.