NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: ? ? ? Re: SNO-T Sextant
From: Bruce Stark
Date: 2004 Aug 11, 12:57 EDT
From: Bruce Stark
Date: 2004 Aug 11, 12:57 EDT
Courtney,
If you are already skilled with a sextant, then the inverting scope may be all you'll need. But at least buy a sight tube. One made to fit a Tamaya will fit the SNO-T, and I'm guessing it will fit your SNO-M. That inverting scope must be something like seven power, and the greater the power, the faster the things you're trying to bring together jitter around. On a small boat, in anything but ideal conditions, you'll probably find you do better with a sight tube than with a powerful scope.
If you are just starting to learn to use a sextant, leave the inverting scope in the box until everything else is second nature.
The "rough contact" I was talking about has to do with what you see in the horizon glass, or mirror. You want the two things you're measuring the angle between to appear there. This is easier to get with the scope off. Then, with the scope on, you can perfect the contact between them.
Bruce
If you are already skilled with a sextant, then the inverting scope may be all you'll need. But at least buy a sight tube. One made to fit a Tamaya will fit the SNO-T, and I'm guessing it will fit your SNO-M. That inverting scope must be something like seven power, and the greater the power, the faster the things you're trying to bring together jitter around. On a small boat, in anything but ideal conditions, you'll probably find you do better with a sight tube than with a powerful scope.
If you are just starting to learn to use a sextant, leave the inverting scope in the box until everything else is second nature.
The "rough contact" I was talking about has to do with what you see in the horizon glass, or mirror. You want the two things you're measuring the angle between to appear there. This is easier to get with the scope off. Then, with the scope on, you can perfect the contact between them.
Bruce
