The Silva map measurer plus is a digital map measurer with a modern waterproof design. The map measurer measures in 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. Functions include: choice of scale; digital display; ability to add or subtract distance; time to destination calculation and countdown timer. A map measurer is essential for planning an expedition in advance. Daily stages can be linked together and the number of days should be equivalent to the distance you want to cover. A well-planned journey begins in the comfort of your own home and leaves you time to enjoy the trip once you are actually out in the wilderness. Add review Read customers reviews