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don1reed · 06-07-07, 10:27 AM

@minimax:

You've made the same mistake as I have re sextant mod...

place the bottom of the sextant ( zero 0) on the bottom of the screen, not, I say again---NOT on the horizon. The sextant will not read low angle bodies & make sure the object you are observing is in the center of the screen, that is make sure you are view dead ahead, then press the (-) key to zero the screen. Do not elevate (up/down arrows), just rotate (left/right arrows) to the body of interest...get it centered in the screen. Bring the sextant from the side and maneuver it between the top/bottom of screen, (a small bit of yellow should be seen at top & bottom when properly adjusted. Registration marks). Now read altitude.

As I've requested and said elsewhere, the Observation scope would be a good candidate for substitute sextant, as it can be elevated to 90°; but, we need a way to read the elevation angle from horizon to body.

06-07-07, 10:27 AM	#16
don1reed Ace of the Deep Join Date: Dec 2004 Location: Valhalla: Silent Generation Posts: 1,149 Downloads: 910 Uploads: 0	@minimax: You've made the same mistake as I have re sextant mod... place the bottom of the sextant ( zero 0) on the bottom of the screen, not, I say again---NOT on the horizon. The sextant will not read low angle bodies & make sure the object you are observing is in the center of the screen, that is make sure you are view dead ahead, then press the (-) key to zero the screen. Do not elevate (up/down arrows), just rotate (left/right arrows) to the body of interest...get it centered in the screen. Bring the sextant from the side and maneuver it between the top/bottom of screen, (a small bit of yellow should be seen at top & bottom when properly adjusted. Registration marks). Now read altitude. As I've requested and said elsewhere, the Observation scope would be a good candidate for substitute sextant, as it can be elevated to 90°; but, we need a way to read the elevation angle from horizon to body. __________________ During times of universal deceit, telling the truth becomes a revolutionary act. ~ George Orwell Last edited by don1reed; 06-07-07 at 10:46 AM.