Revision history of "Celestial navigation"

This is a list of past revisions of Celestial navigation. Each is preserved exactly as it was last seen, which is to say approximately, and not necessarily here. Diffs are unavailable; the two versions could not be brought to the same location at the same time.

External tools: Find addition/removal · Find which edit moved the page (inconclusive)

• cur | prev 2026 NotTheMudGeometer (talk | contribs) . . (2,470 bytes) (+45) . . (IF IT WORKS SO GOOD HOW COME HE DID NOT NO HIS LATITUDE. HE FOUND A LIGHTHOUSE BY LUCK AND YOU HAVE BUILT A WHOLE SUBJECT ON IT) (current)
• cur | prev 2026 an editor (talk | contribs) . . (2,425 bytes) (+210) . . (→ said at the top that a sight gives a circle and not a position, because every account that skips it makes the rest of the article sound like magic. one circle, thousands of miles across; two circles, two crossings, one of them absurd; three, a small triangle that is still not a point)
• cur | prev 2015 an editor (talk | contribs) . . (2,215 bytes) (+190) . . (→ the Naval Academy has put the course back. nothing about the method improved in seventeen years. what changed is that the satellites can be jammed and spoofed by people who are not us, and the sky cannot)
• cur | prev 1998 an editor (talk | contribs) . . (2,025 bytes) (+130) . . (→ the Naval Academy has dropped the course. the satellites do it in a second and nobody can be made to sit through spherical trigonometry when a receiver is on the bulkhead)
• cur | prev 1995 an editor (talk | contribs) . . (1,895 bytes) (+230) . . (→ set the corrections out in Bowditch's order and said why the order matters: index error and dip give the apparent altitude, and the rest have to be entered with that, because how far the air bends a ray depends on how high the ray is. also said what the answer is: the altitude that would be seen from the centre of the Earth, by nobody)
• cur | prev 1943 an editor (talk | contribs) . . (1,665 bytes) (+170) . . (→ there is no sea horizon from an aeroplane, so the sextant has grown a bubble and carries its own. it is worse than the sea horizon and it is available at eight thousand feet in the dark, which the sea horizon is not)
• cur | prev 1875 A. Marcq de Saint-Hilaire (talk | contribs) . . (1,495 bytes) (+300) . . (→ calcul du point observe. take a position you know to be wrong, compute what the sextant ought to have read from there, and lay off only the difference. observed the greater, towards the body; computed the greater, away from it. the fix is made out of the error in the guess and does not depend on the guess)
• cur | prev 1861 the Mud Geometer (talk | contribs) . . (1,195 bytes) (+55) . . (YOU ARE NOT FINDING WHERE YOU ARE. YOU ARE FINDING WHERE A BOOK SAYS A STAR IS AND THEN BELEIVING THE BOOK. THAT IS NOT THE SAME AND YOU NO IT)
• cur | prev 1843 T. Sumner (talk | contribs) . . (1,140 bytes) (+260) . . (→ written up as a method, with the examples worked from the whole degrees either side rather than the ten minutes I actually used. tidier on the page. it does lose the thing that made me look twice, which was that the gaps were equal)
• cur | prev 17 December 1837 T. Sumner (talk | contribs) . . (880 bytes) (+420) . . (→ six hundred miles without a sight and the latitude not to be relied on. I worked the longitude at my own latitude, then ten minutes north of it, then twenty; the three came out twenty-seven miles apart each time and lying in a line towards Small's light. the altitude must have happened at all three points and at the light at the same instant, so the light bears E.N.E., if the chronometer is right. it did, and it was, and my latitude was eight miles out)
• cur | prev 1767 N. Maskelyne (talk | contribs) . . (460 bytes) (+220) . . (→ the Moon will serve as the clock nobody can carry. distances from the fixed stars, tabulated years ahead for the meridian at Greenwich, and a navigator who can measure the same angle has the time at Greenwich and therefore his longitude)
• cur | prev 1547 an editor (talk | contribs) . . (240 bytes) (+240) . . (created page; a cross-staff and an astrolabe will give the height of the sun, and the height of the sun at noon will give the latitude. that is the whole of it at present. for the longitude a ship sails north or south until the latitude is right and then runs east or west along it, which is slow and puts every vessel on the same road as the pirates)

Older revisions exist but have not been located. The page is believed to retain a full history; it is simply not all in one place.