Measuring only .75" X 1.1" X 0.3", APC-4 is the smallest and yet the most capable, user friendly, automatic leveling control available. Based on 25 years of "hands on" research and development, APC-4 is arguably the best there is. Simple installation, intuitive adjustment which allows fine tuning to meet your own boat's needs, variable sensitivity and it's able to "stand alone" (no signal input required) so you don't have to waste a channel unnecessarily. The incredibly small size allows installation in even the smallest boats, the tightest compartments.
Automatic Depth Control （深度控制仪）
Combining a state-of-the-art pressure sensor with microprocessor control, ADC - 1 (Automatic Depth Control) will do for depth control what the APC has done for leveling control. Now you can keep your boat at periscope depth all day long! Want to run deeper? Just push the stick forward. ADC - 1 features proportional servo control, the ability to maintain any depth up to 4 feet, can be turned on/off from the transmitter, easy installation, and small size (1 1/2" x 1 1/2" x 3/4").
Can be connected to either bow or stern planes.
Note: An Automatic Leveling control is required for proper operation.