How to use Plastic Sextants 815 The upper “Black” scale (the

The upper “Black” scale (the one more usually used) reads directly in gauss of a uniform magnetic field oriented parallel with the centerline of the instrument scale

how and why they did it

Torres Strait

It's a bit of a mixed bag and a complete surprise for us as to what is coming out of the shelf -  ten flat maps can be sent in one of our 'standard' sized cylinders

Mort Harbour 1:37 500

How to use Plastic Sextants 815 The upper “Black” scale (theHow to use Plastic Sextants by David Burch Sextants are used to measure angular heights of celestial bodies above the horizon to find the latitude and longitude of the observer. They can also be used on land with artificial horizons. Sextants can also be used to find the correct Universal Time by measuring the angular distance between the moon and another body along its path across the zodiac. In coastal waters or on land, sextants can be used for