Related Clues:
- Perhaps where the water is calm one may start to reckon how high it is
- It's used in reckoning the height of hills
- At this point, land appears
- Standard for measuring map heights
- From which the heights of hills etc are measured
- It rises every year
- High ground is above it
- Witness told has some neck in between the French and the Spanish indicating how the land lies!
- Elevation standard
- Ben's height is measured relative to this Cork daredevil biker
- Where heights are measured from
- Calm conditions, presumably, at this reference height?
- From which altitudes are measured
- Altitude reference point
- A term of Geography? Students here finally get to take exam