I don't know the mechanism you are seeking for disabling the alarm on loss of position update. I do note that the alarm is suggested in the specifications for a DSC radio
, ITU-Rec. M.493-13:
Section 12.7 Position updating
If the automatic position update is not available, a displayed and audible reminder to manually update the position should occur before the position information is 4 h[ours] old. The displayed reminder should remain until position updating has been carried out.
The radios from Standard-Horizon seem like they are very compliant with the specifications.
Your best solution is probably to employ an external GPS receiver. This will let the radio
work as it was intended, that is, to be automatically updated with the vessel's current
Or, buy an older radio that does not have DSC
or does not follow the specifications so closely.
I can sympathize with you. I have been awakened several times about 3:30 a.m. when my Standard-Horizon radio alerted me that it did not have a position update because I forgot to turn it off when I went to bed
but did turn off the chart plotter feeding the data to the radio.