Because of the CYPRES automatic weather correction feature , it will re-zero itself on the way back to the take - off location .
It is necessary to switch it off and reset the DZ altitude reference prior to each jump at the remote airfield .
Because of the CYPRES automatic weather correction feature , it will re-zero itself on the way back to the take - off location , so it is necessary to switch it off and reset the DZ altitude reference prior to each jump at the remote airfield .