Silva Inclination and Card Knife 451131 Unico One Size

This is perfect for use on OS maps. I can’t understand why people would complain it doesn’t function in miles when maps are Kilometres

This is a quality product, as one might expect from Silva. Yes it is more expensive than the multiple cheap alternatives, but it has a huge advantage : it works faultlessly. I learned the hard way, I initially bought a cheapo: the mechanism was so stiff it nearly cut through the maps, and daft though it may seem, the scale was wrong ( 6 miles read off an O. S. Map showed as 7.5 on the 1:25000 read off, 6.0 on the 1:20000 read off - the map was an Explorer 1:25000. One downside, it only does Km. Hey hey I'll have to go metric at last!

I thought this would be better quality than the the cheaper ones. It’s not save your money

It is so inaccurate as to make it useless for measuring distances of mountain trails on 1:25000 scale maps which is what I wanted it for.

don't waste our money, does not workwell in the field as you need the map to be perfectly flat and a hard survace underneath.

A very useful, compact and light addition to my trekking gear.

Quite expensive but not particularly well put together. Very plasticky. Overpriced in my view. Doesn’t work well on plastic coated maps. Would not buy again.

Would not buy this because of the kilometre system. Very poor oversight / design IMO.

caractere pratique

Il prodotto funziona però è molto difficile seguire le linee sulla cartina perciò la misura diventa un po' approssimativa comunque tutto sommato valido

He comprobado si las escalas sobre mapa las marca correctamente comparándolas con una regla , y sí , perfecto. Muy buen medidor de distancias.

I purchased this item thinking that I was going to be taking a land navigation course, and after trying it out on several different maps I am very impressed! In a world focused on GPS - and I also use a Garmin 401 - there is something to be said for the mechanical tools that were once commonplace in any NCO's kit. This is a robust tool that is easy to read and has most common map scales on it. Very useful for military, preppers, and outdoor enthusiasts! Very happy with this purchase!!

Konnte ich nichts mit anfangen !