0
it is read in tenths of a foot, engineers scale
Elevation of point + whatever reading from Meter Rod= HI
Lumineons can be obtained via route 219 with a good rod or by leveling a Finneon up to level 31 - Finneons can be found on route 218 with a good rod.
when the bubble in the center is centered its level
By leveling up a magikarp to level 20 or use a super rod in sootpoliss city.