The Auto Hover System works by taking pressure transducer readings, inputting them into our computer controlled depth system to automatically control the depth control motors.
The Auto Depth Control system uses three fixed position thrusters. All three depth control thrusters are computer controlled by the depth control system. There are two available modes of operation:
• Manual Mode
• Auto Hover Mode (Includes Auto Ascent/Descent Rate Control)
With Auto Depth Control engaged, whenever the vertical thrusters are not being operated manually, the computer takes control of the thrusters and uses them to hold the sub at its current depth. When the pilot wants to change depth, the thumb switch is used to ascend or descend. Once you have reached the depth you want, the pilot releases the thumb switch, and the computer again takes over and will maintain the new depth. Auto Rate Control is operational in this mode. The Auto Rate Control function or 'automatic ascent rate control and descent rate control', prevents the sub from ascending or descending too quickly (faster than 1 foot per second). This is a significant safety feature.