Unlock Tridata
It appears that the "user Calibration" is turned off. You have to go into the "dealer Calibration" mode to unlock your unit. To enter the Dealer calibration, hold the depth and speed keys together for about 12 seconds. Then press the trip and reset keys together to enter the calibration screen. Press either the trip or reset key to turn User Calibration on or off. Hold the depth and speed keys for 2 seconds to exit the dealer calibration mode.