NavList:

You can get really thick gear oil (SAE 80 wt or even SAE 140 wt). Stuff is really thick, almost like honey. I used to use it for an AH before I got a bubble sextant. Would take quite a breeze to put ripples in it.

Paul Dolkas

From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bill Lionheart
Sent: Saturday, January 28, 2017 7:59 AM
To: paul@dolkas.net
Subject: [NavList] Re: An artificial horizon opportunity?

I found "baby oil" ie mineral oil a clear distillate of paraffin oil

but easily obtainable in pharmacists,a bit better than water as it is

a little more resistant to ripples (is that due to viscosity?). I pour

it in to a black plastic tray.

Bill

On 28 January 2017 at 00:28, Alan S  wrote:

> for shots with an AH, I use a dish of water, with some sun/wind shades in

> the parking area of the apartment complex we reside at. It has worked quite

> well,with my calculated position being within a couple of miles of GPS

> position most of the time.

> 

> Alan

> 

> 

--

Professor of Applied Mathematics

http://www.maths.manchester.ac.uk/bl