Raymarine ST 60 Tridata stuck on Calibration Off

[Richy888]

On a boat we have just got.

We are having trouble getting our ST 60 to calibrate.
We have followed the Owners handbook and can get up
Cal off. Then can't change it, we can get to
UEr 3.02 but can't change anything
Dlr Cal. But again can't change anything.

We are unsure but think it maybe stuck in boat show mode.

We have also had an alarm going of every time the depth goes up over 21 ft is there a simple way to turn this off?

Help........

Thanks Richard SV Ilikai