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Re: Cassens and Plath Professional Bubble Horizon
From: Jean-Philippe Planas
Date: 2010 Jan 27, 14:36 -0800

Yes John, I had a reply from Ken stating that if you proceed carefully with the C&P bubble attachment (i.e averaging two readings from the top and bottom of the bubble) it can provide a precision of 1 minute of arc and this would be the same as with an aircraft bubble sextant MK IXA for instance.
Otherwise it can be several minutes of arc.
JPP

--- On Wed, 1/27/10, Geelhoed@dishmail.net <Geelhoed@dishmail.net> wrote:

From: Geelhoed@dishmail.net <Geelhoed@dishmail.net>
Subject: [NavList] Re: Cassens and Plath Professional Bubble Horizon
To: NavList@fer3.com
Date: Wednesday, January 27, 2010, 2:51 PM

Jean-Phillipe,
Have you had any reply from Ken Gebhart, perhaps off-line, or an opinion on using a C&P bubble horizon on a marine sextant versus an aircraft sextant?
Regards,
John Geelhoed
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