Luminous bezel and base plate markings (so you can see the bearing you're following when your headlamp runs out of batteries!)

Adjustable declination scale (So you can set your magnetic declination at the beginning of the race when your brain is fresh and functioning!)

Magnifying lens diameter 16 mm (for when you think there's just 1 thick contour line but there's actually 28!)

Clinometer (Gauges the angle of a slope for those considering rockfall and avalanche danger)

Coordinates scales 1:50'000 and 1:25'000 (significantly improves UTM cooridinate plotting accuracy)

Side scales in mm and 1:50'000 (Easily measures how many more km's you'll be up to your neck in swamp!)

Conversion table degree / slope % on cover Anti-slip rubber pads on bottom (So you're navigator can't claim "the compass must have slipped")