This fine sextant has been sold. Thank
CHO-T / SNO-T RUSSIAN SEXTANT
Copyright, 2007 Land And Sea Collection ™ , All rights
PRESENTED is Serial No. 821552, dated 1982 all
around good condition, with no index error, and complete with both a Carl Zeiss 4 x40 erect standing "Star" scope
and a 6 x 30 inverting collimation scope. Frequently, you will see this make sextant sold only with the inverting scope which
is useless at sea in smaller size vessels.
OVERVIEW: I have been particularly impressed with the Russian
CHO-T sextants as a good alternative to the premium brands such as both Plaths and Tamaya. It also
makes sense to invest in one rather than plastic which commands very high prices for what they are, and any sextant with
In our opinion, Russian sextants are becoming better known in this country, and
there prices have been on the rise. This is because of their large mirrors, compact size, quality optics and overall good
construction found only in the serious sextants. However because so many of them are sold
with only scopes that show the image upside down they may nit always be a good buy. The design of the CHO-T
has some features similar to the Freiberger, but is smaller, by almost one inch on the vertical measurement
which makes it ideal on small yachts. Some of the parts, such as mirrors and the tangent screw, are
Those who have used this model sextant at
sea, speak very highly of it. If you are a small boat navigator make sure to keep the enclosed tangent
screw free of salt water and lubricated with WD-40 and you will have no problems. You also will welcome
the light weight and full size mirrors of a CHO-T compared to other lesser cost alternatives.
The only Russian sextants
we sell are those which have a scope that
the object in a manner familiar to navigators, not astronomers.
If not fitted with one, we carry new
3.5 x 40 scopes which we sell as an optional accessory. It fits perfectly, and has been
purchased by many Russian sextant owners for this very purpose. Write us for details.
parts are in good condition, and freely working. Both mirrors are in "like new" condition. The adjustable index error is zero.
The case is the typical light grey with rubber feet, shows its use at sea, and has a few small scratches. The inside
cover of the case is an inventory card in Russian, but NO INSPECTION CERTIFICATE which is standard with these sextants since
they were built to a standard of less then 10 seconds of arc error making this of no consequence. The numbers and date
on the placard on the case match the sextant. The special monocular micrometer drum magnifier is attached which also
is a lighting feature when charged by an independent light source. Inventory item 4, a smaller screw driver is missing as
are the set of extra mirrors. The wooden block cleats were damaged in shipping and have been repaired. There is a small wood
clamp missing. However, none of this affects the sextant's condition which is excellent.
OUR UNCONDITIONAL GUARANTEE:
If not completely satisfied with your purchase it may be returned, if without damage, within three days of receipt in its
original condition and packaging. Return items must be insured for their full value. A prior email authorization by us for
the return is required. Unfortunately, no refund can be made for the cost of shipping, packaging and handling unless we are at fault.
ADDITIONAL COMMENTS: This sextant is smaller than
normal, and is a very handy size for a small boat navigator. Its index arm measures
7 7/8' which is about 1/2" less than most full size sextants. Its case is correspondingly
smaller. This should be an advantage to most people. The scopes are made
by Carl Zeiss, a noted lens manufacturer. CHO-T sextants are made for the
Russian Navy, and are typically seen in cases painted grey. Decent examples of this sextant are frequently seen on ebay
and some have been sold for less than many inferior brands. The better ones are priced around $350.00 in Russia, and the typical freight charge to the U.S. is $90 or more, to this must be added the $45 wire transfer fee which will be charged
by your bank. So expect to have landed costs of $485.00 plus duty and the aggravation of a trip to the bank and a
long delivery time.
This sextant gets our 4 1/2 Plus
Star rating because it comes with both scopes, and is in excellent condition. It is graded down because of the less
than perfect case.
ABOUT SEXTANT TELESCOPES AND MIRRORS: For serious navigation, don't buy a plastic sextant. You will be mostly shooting twilight sights of stars and planets where
large size mirrors are very important. They capture more light and the object has a larger surface to stay on, so
that it doesn't jump off as easily. No plastic has anything close to the big mirrors on the preferred brands.
The right scope
is very important, and for twilight sights a 3.5 x 40 or 4 x 40 are the preferred choices because of their ability to pass
through more light rays, and the lower power minimizes movement. A scope more powerful than 7 x 35 is useless from small
craft unless stabilized because it also magnifies your own movement and that of the celestial body making it seem to be jumping
Be careful if you decide
to choose a Russian sextant that the scope's image is NOT upside down. Many of them are astronomical in design.
DOES MY OPINION COUNT: We are one of the few company's still selling navigation instruments that know anything about them. For purposes of judging
whether my opinion counts, I was the editor of the chapter on sextants of the 1977 Edition of "Bowditch", The American
Practical Navigator, NAVPUB 9; a member of the U.S. Naval Academy Navigation Symposium Board, 1975 -1978; the author of a
book on marine sextants, Cornell Maritime Press,1975, and the founding president of Nautech Maritime Corporation which partnered
with Tamaya of Japan in the introduction of the MS 733 Spica, the MS 833, Jupiter, MS 933 Venus sextants and the famous NC-2
navigation computer, in the U.S. market. I also am a retired Master Mariner, and held a U.S. Navy "D" Qualification
as a Senior Skipper - Oceans. From 1995 until 2001, I served as a Varsity Offshore Coach at the U.S. Naval Academy.
RUSSIAN CHO-T Drum Sextant SPECIFICATIONS:
Measuring Range:-5 to 140 degrees
x 40mm: Coated optics and 6 x 30mm collimation scope with cross hairs
Frame: Lightweight die cast aluminum alloy with corrosion resistant light gray finish.
Scale: reads to 1.0 min. Estimates to 1/10 min
Index Mirror: 56 x 42 mm. aluminized on the rear side.
Mirror: 57mm diameter.
4 for index mirror
3 for horizon mirror
Length of index arm: 7 7/8"
lbs, 8 lbs in case
Carrying case: Grey painted wood case with placard - no key
- 1 CHO-T Marine Drum Sextant frame
- 1 3.5 x 40 Scope - OEM
- 1 6 x 30 inverting scope
- 1 Mirror adjustment wrench
- 1 sextant case
- 1 wrench for removing the handle
- 2 90 degree angle devices
- Rubber eye piece for scope
- 1 vale of oil
For those seeking more information about the modern marine sextant I suggest
they get a copy of a book written in 1975, now out-of-print. The Myths & the
Truth about Selecting a Marine Sextant. Cambridge MD: Cornell Maritime Press, 1975. 44pp, 10 illustrations. Topics include
scope power, mirrors, shade glasses, theoretical brightness, accuracy, workmanship, accuracy, comparison of specifications. It
is available at the University Library, all locations, of The California State University for free.
International buyers welcome, but inquire first. We have satisfied customers in Australia,
Austria, Belgium, Bermuda, British Virgin Islands, Canada, Chile, China, Denmark, England, France, Germany, Holland, Hong
Kong, Iceland, Israel, Ireland, Italy, Japan, Kuwait, Martinique, Mexico, New Zealand, Norway, Nova Scotia, Saudi Arabia,
Scotland, Singapore, Spain, Sweden, Switzerland, Thailand, USVI and the Eastern Caribbean.
Don't let this unusually fine instrument get away. Buy Now!
2007 Land And Sea Collection ™ , All rights reserved
Copyright 2007 by Land And Sea Collection ™ . All Rights Reserved.