Silva Expedition 25 TDCL
View all Navigation and Survival
View all Navigation and Survival from Silva
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The mirror-sighting compass with all the features required by professional users including geologists engineers and defence forces. Features include:- Luminous needle and points on the base plate to aid use in low light/darkness Measuring scales in mm inches as well as 1:25000 and 1:50000 Clinometer and declination adjuster are also included.
Silva Expedition 25 TDCL Reviews
Reviewed by Roy Harrison (Edinburgh) on 2006-03-11:
General comments: Clearly Silva are the best when it come to compasses. And of their designs, this is probably the most versatile. The usual advantages of mirror sighting and deviation adjustment are present, with the addition of the clinometer. This is not only useful for examining the dip of sedimentary strata (not much use in navigation!), but also for showing the angle of the slope upon which you are standing, which with some experience and basic mental arithmetic enables translation to the contour widths on the map. Not always a lot of use on its own, but any additional information during difficult navigation is always welcome....
Pros: All the toys, made by Silva