The watch is designed to sound its alarm whenever you ascend faster than 1 m/sec, and there's no way to disable that function.
There is a way. I took mine to the service center to have it done, and I think Pursuit says he did it himself. Its just that all alarms are then disabled, but that wasn't a concern for me. I didn't want an alarm clock.
Where I think I'm still in the dark here is this- does some later version of the Aqualand really have a full functioning freedive mode with features such as the D3 and F10?