Question 1

Are the luminescent markers self-luminating (tritium), or do they need to be exposed to light for them to be luminous in the dark?

Accepted Answer

I believe the markers are luminous paint. There is luminosity only in the four cardinal directions on the interior of the compass, while the degree markings around the outer circumference are plain white paint. In order to be fully functional for luminous use, the compass would need luminous markers on the cardinal points and also on the degree markers. This would make such a compass very expensive indeed. There may be a small amount of tritium dust embedded in the paint but these are not solid tritium markers such as you would find on high grade rifle sights. The markers glow very faintly but you can enhance the glow by shining a bright light onto the markers for several seconds. If the compass fits your watchband, it will be functional but don't expect military grade performance. In pitch dark, you will need to acquire a ray of light from somewhere in order to use this compass. Moonlight should be sufficient to allow use of the compass but not sufficient to charge the luminous markers.

Question 2

What os (one size) means? does it mean it can work in northern and southern hemisphere?

Accepted Answer

The clipper model # SS004102011 is for the Northern hemisphere
The clipper Model # SS004102012 is for the Southern hemisphere
OS means Ordnance Survey as already explained

Question 3

This can be used for diving?  I don't see a depth resistance rating on it's description.  Thanks.

Accepted Answer

Mine has survived 15+ dives between 40 and 80 ft and works great clipped to the lower strap of my wrist-mounted computer just above where it meets the buckle.  I don't expect any problems with zero air visible inside.

Question 4

is this model made in China

Accepted Answer

The Suunto Clippers that I received were manufactured in Finland. One of the two reasons I purchased them (1 - Suunto reputation, 2- made in Finland)

ASIN	B000BSDU4Y
Additional Features	Portable, Waterproof
Best Sellers Rank	#25,030 in Sporting Goods ( See Top 100 in Sporting Goods ) #41 in Compasses
Brand Name	SUUNTO
Customer Reviews	4.1 4.1 out of 5 stars (4,603)
Global Trade Identification Number	00045235900367, 06417084041029
Included Components	compass
Item Dimensions L x W	5.5L x 4.9W centimeters
Item Type Name	compass
Item Weight	0.07 Pounds
Manufacturer	Suunto
Manufacturer Part Number	9001681
Map Scale	1:50,000
Material Type	Composite
Model Number	SS004102011
Mounting Type	Clip Mount
Number of Items	1
UPC	097914398958 045235900367 045235510351 799916932153
Unit Count	1 Count

Clipper L/B Nh Compass

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