A reel assembly for deploying a cable, hose or umbilical connection may include an electronic control unit that may operate to control the reel assembly. A sheave that redirects the direction of the cable, hose or umbilical connection may include sensors that 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. The electronic control unit may, based on received sensor data, automatically direct the operation of the reel assembly. 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 parameters of the drive, and the like.