Sorry for all the suggestions but I have been planning a lot of routes lately.
The request is that the distance measuring tool have more than 1 significant digit when measuring distances in the range of 1 cable (0.1NM) thru 1 NM.
Going from to the meter measuring up to 185m then to 0.1NM graduations is too coarse in the range of 0.1 - 1.0 NM
Cheers