Digital map measurer with a modern waterproof design. Measures
kilometres, miles and nautical miles. Given a known speed it
can also calculate how long it will take to cover the rest of
the route. Choice of Scales, adds/subtracks
distance.
Simply position on any Ordnance Survey map or geological map
with a scale of 1:50 000 (2cm to 1km) or 1:25 000 (4cm to 1km)
and use the handy grid to accurately locate your position.