CRM Software

Sextant Key 6.5.40

Developer: North American Software
Specifications: This is the first release on CNET
Requirements: Windows 98/NT/2000/XP/2003 Server/Vista
Limitation: 45-day trial
Operation system: Windows 98/NT/2000/XP/Vista
Price: $599
License: Free to try
Version: v6.5.40
Downloads: 1475
Rating: 4.6 / Views: 2327
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Non-Adjustable Errors

Figure 6 shows a piece of parent brass being tried for size in the mortice of the piece that I have chosen to call the sliding block (since nobody else seems to have done so in print), and Figure 7 shows the clamps screw being checked before final turning. When reading OFF the arc, graduations of the micrometer should be read in the reverse direction (59 as 1’, 55 as 1’ and so on). This solid brass sextant has a slow motion control, an adjustable index mirror, an accurately divided German Silver scale and vernier readout, magnifying lens, telescope, and six filters.

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It features adjustable mirrors and comes with a signed certificate of authenticity. I went metric over twenty years ago and my odds and ends of Imperial screwing tackle do not include 5/32 x 32 tpi, so I had to screwcut it in the lathe. Sighting the height of a landmark can give a measure of distance off and, held horizontally, a sextant can measure angles between objects for a .

Rare Spencer, Browning & Co. octant (1840-1870) in original wood case, excellent

It allows for the “bending” of light rays as they travel through successive layers of varying density air. CLICK ON PICTURES FOR LISTING Rare British Air Ministry Seaplane Sextant Attributed to Henry Hughes & Co. While this undoubtedly made it cheaper to manufacture, it had the unfortunate corollary that there was nothing by means of which one could pick it up, except for the handle, so it was provided with a light moulded plastic case in which it sat handle uppermost.

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The 0.7 kg reduction in weight makes using this model of sextant a pleasure and it has not been my experience that a lighter sextant is more difficult to use when there is a strong wind. CLICK ON PICTURE FOR DETAILS  Very Rare U.S.Maritime Commission WW II Sextant Brand new and never used  5 Plus STARS 1946 certificate Mint condition SOLD. Later, this became “D.S.€ for “Deutsche Seewarte” or German Naval Observatory, some time after the formation of the German state in 1871. This is a relatively coarse way of adjusting and may involve much trial and error, but once done, the whole set-up is rigid and not likely to drift out of adjustment in a way that is so annoying with plastic “instruments”. Plath Bubble Horizon Deutsche Hydrographic Institute certification Fits many sextants  Like new condition 5 PLUS STARS SOLD.

C. Plath Marine Sextant without telescope MARINE NAVIGATION MILITARY

The label in the lid counsels against using alcohol to clean the instrument, suggesting that it is painted with a shellac-based lacquer (which dissolves in alcohol). The main use of a sextant is to determine the angle between a celestial object and the base horizon, which defines the object’s altitude. The index arm journal took the form of a bronze bush surrounding a boss extending from the bottom of the index mirror bracket and the bronze-coated journal ran directly in the frame, being secured by means of a C-ring and a nylon washer (Figure 20).

Sextant Color Icons

It has to be possible to bring the horizon mirror perpendicular to the plane of the arc and to bring it parallel to the index mirror when the instrument reads zero. Solely plays Path of Building :/ -1 points0 points1 point 1 year ago Can you guarantee a sextant mod this way? CLICK ON PICTURES FOR DETAILS Navistar Classic Sextant Sailing the Dream 4 x40 Scope Transflex Whole Horizon Mirror Instruction Booklet & Certificates –  5 STARS Optional Plath Near New 6 x 30 Monocular SOLD. Again the horizon shades seem identical, but their mounting s are not. If I make a mess of the bowed front, I will still have two sides to use in a square box.