Very Good question Dave. The blackbox website FAC had this to say:
Q. I have a Cannon or other electric downrigger that uses the short stop feature. Can I use this with the Black Box?
A.The Cannon short stop feature is a system where the electric downrigger automatically stops when the weight breaks the surface of the water. This is accomplished by using the downrigger wire as part of the electric control circuit. When the Cannon downrigger is turned on, a strong positive charge of up to 7 volts is imposed on the wire. When the weight breaks the surface, the circuit is broken and the downrigger stops. The Black Box
is going to impose a steady voltage of whatever you dial onto the wire (.5 volts .6 volts etc.). If a downrigger with a short stop is turned on with the Black Box running, the Black Box voltage control circuit will not let the voltage on the wire rise above your setting.
The result is normally the short stop feature will be over ridden and the weight will not stop until it jams into your downrigger pulley. If the Black Box switch is turned to natural voltage position prior to turning on the downrigger, the automatic stop will work.
Im going to rethink getting a blackbox because I can just visualize watching my shark downrigger balls breaking off at the boom because Im not paying attention to the short stop not working.
