Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 10-02-2011, 06:54   #1
Registered User

Join Date: Feb 2011
Location: India
Posts: 1
Images: 1
Send a message via Skype™ to shariqafroz
How Can I Know if a Sextant Is Certified for Navigation ?


I would like to know about certifications across the world for working sextants.

what are the types of these certifications and which agencies are responsible for these.


shariqafroz is offline   Reply With Quote
Old 10-02-2011, 08:08   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Out there doin' it
Boat: 47' Olympic Adventure
Posts: 2,719
I'm not sure what other classification systems are in use around the world, but British or former-British colonies would likely use the Brit classifications, which I believe were set by the Royal Observatory - Class A means total errors less than 30 seconds and Class B less than 3 minutes(iirc). More important than the classification, would be the date of the last inspection - a sextant should have an error chart with it; if that is missing or dated, then you would have to measure it yourself or get it done, though I don't know where you would get that done.

Lodesman is offline   Reply With Quote
Old 10-02-2011, 08:56   #3
Registered User

Join Date: Nov 2010
Location: salem ma
Boat: dreadnaught 32 offshore cutter WALRUS
Posts: 11
im not sure about certification but you must always check and determine index error prior to taking a round of sights.even if certified bumping it even lightly can make a sizable error.i would think any sextant without obvious damage made by a reputable maker is enough provided you check index error and develop the ability to take sights at sea.i use an astra 3 but would love a c plath
mohawkmariner is offline   Reply With Quote
Old 10-02-2011, 10:39   #4
Registered User
Astrid's Avatar

Join Date: Oct 2008
Location: Northern British Columbia, part of the time in Prince Rupert and part of the time on Moresby Island.
Boat: 50-ft steel Ketch
Posts: 1,885
Send a message via MSN to Astrid Send a message via Yahoo to Astrid
Certification usually comes from the manufacturer and a certificate is included with the case. These can get lost, of course, but you can have a sextant re-certified either by sending it back to the manufacturer, or through a second party sextant repair shop:

Compass Adjusting and Repair, Contact, Navigation Instrument Service, Island Marine Instrument Co Inc

That company is out of Washington state. On the other side, in Massachuesetts:

Robert E. White Instruments, Inc. | 711 Atlantic Avenue, Boston, MA 02111
Tel: 800-992-3045 (U.S./Canada) Tel: 617-482-8460 (Eastern MA) Fax: 617-482-8304

However, there are many things you can do to check your sextant for accuracy yourself, and a good place to start would be to get hold of a copy of Bruce Bauer's Sextant Handbook.
'Tis evening on the moorland free,The starlit wave is still: Home is the sailor from the sea, The hunter from the hill.
Astrid is offline   Reply With Quote

navigation, sextant

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Crew Available: Competent Crew Certified Couple-Las Palmas Natalie Jones Crew Archives 0 07-11-2010 17:02
Crew Available: Day Skipper / Certified Crew in Oceania / SE Asia IanMc Crew Archives 0 02-09-2010 01:45
Crew Wanted: Need Gill Certified Captain for Bachelor's Cruise dwalkerman Crew Archives 3 01-07-2010 12:03
Newly-certified crew looking for experience in Exumas Shamanskys Crew Archives 0 25-04-2008 17:14
Davis Mark III Sextant Celestial Navigation Training Aid longonsilver Classifieds Archive 0 27-01-2008 14:17

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:46.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.