You may buy a copy of The Nautical Sextant  from :

through Amazon.Com and through all good booksellers worldwide



My bubble sextant reconditioning manuals for the British Mk IX and IXA, and the US A10 and A12 instruments are still available for download or as CDROM. Contact me at for details

I have now completed a manual on the structure, overhaul, repair, maintenance and use of the SNO-T sextant, with notes on the Freiberger Trommelsextant (drum sextant) where it differs significantly from the SNO-T. There are over 60 pages of detailed colour photographs and diagrams that will take you step by step through the overhaul of this fine instrument, down to the last nut, bolt and washer. It is available as a download of 5MB for US$19.50 or, for an extra US$4.00, on a CDROM posted to you anywhere in the world.

Jean-Philippe Planas writes: I found this manual captivating and an essential tool for any SNO-T owner or prospective sextant buyer. Once again, you wrote a masterpiece with detailed explanations, plenty of useful tips for overhauling/repairing delicate mechanical systems and high definition pictures with excellent lighting.

This manual is an indispensable addition to the library of any serious sextant enthousiast and the definitive work on the outstanding SNO-T instrument

Contact me at for details of how to purchase.

Bill Morris.


New Zealand

%d bloggers like this: