Since I've been asked about Bottom Track several times lately, I'll do my best to answer and describe the feature here.
Bottom Track is a feature that allows your Cannon Downrigger to keep your weight a set distance off the bottom.
This feature is available on the new STX Digitrol 10 and Digitrol 5. You'll also find it on the older DT 4's
The DT10 has a plug for it's own transom-mount transducer and has a built-in digital depthfinder.
To engage Bottom Track, you simply press MENU and then RUN on the key pad.
For effective Bottom Tracking, you must set three parameters:
1. Maximum depth to track (could be as much wire as you have on the spool)
2. Sensitivity (Amount bottom must change before the rigger changes depth. I usually set mine to 3 feet)
3. Distance off bottom (Also known as "Blowback", the range of this feature is -20 to +20 feet.
You will find that you will be changing the blowback with changing troll speeds, direction and tidal flows.
The mechanical effiency of Cannon's Bottom Track is a HUGE advantage and I will have a blog and video out with a complete discription soon