NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: NO 9xx plotting sheets
From: Peter Hakel
Date: 2014 Jan 24, 12:39 -0800
From: Peter Hakel
Date: 2014 Jan 24, 12:39 -0800
Lu,
Besides making one’s own plotting sheets, pre-printed options include:
*) VP-OS (Universal) plotting sheets:
http://www.celestaire.com/Plotting-Accessories/Universal-Plotting-Sheets-VP-OS/vmj_estore.tpl.html
http://mdnautical.com/plotting-sheets/19670-5910-universal-plotting-sheers-vp-os.html
The default scale there is 20 nautical miles per inch, but you are not restricted to that.
*) metric graph paper, suitable for “Kermit’s scale :-)” of 1 nautical mile per centimeter, which allows for more “zoomed-in” and hence more accurate plotting (resolution of 1 mm, i.e. 0.1’).
I have used both:
http://blog.navigation-spreadsheets.com/2013/03/08/many-body-celestial-fix-for-a-moving-vessel.aspx
Peter Hakel
From: Lu Abel <luabel@ymail.com>
To: pmh099@yahoo.com
Sent: Friday, January 24, 2014 10:13 AM
Subject: [NavList] NO 9xx plotting sheets
Besides making one’s own plotting sheets, pre-printed options include:
*) VP-OS (Universal) plotting sheets:
http://www.celestaire.com/Plotting-Accessories/Universal-Plotting-Sheets-VP-OS/vmj_estore.tpl.html
http://mdnautical.com/plotting-sheets/19670-5910-universal-plotting-sheers-vp-os.html
The default scale there is 20 nautical miles per inch, but you are not restricted to that.
*) metric graph paper, suitable for “Kermit’s scale :-)” of 1 nautical mile per centimeter, which allows for more “zoomed-in” and hence more accurate plotting (resolution of 1 mm, i.e. 0.1’).
I have used both:
http://blog.navigation-spreadsheets.com/2013/03/08/many-body-celestial-fix-for-a-moving-vessel.aspx
Peter Hakel
From: Lu Abel <luabel@ymail.com>
To: pmh099@yahoo.com
Sent: Friday, January 24, 2014 10:13 AM
Subject: [NavList] NO 9xx plotting sheets
There are no large scale charts of the middle of the
ocean, so if one is going to keep a reasonably detailed navigation plot (DR, GPS fixes, celestial shots) one needs some sort of plotting sheets.
A long time ago the US Navy's Hydrographic Office produced a series of charts which were basically blank Mercator charts covering 3 degree intervals of latitude and 3 to 6 degrees of longitude depending on latitude. For example, NO973 covers the band from 38 deg to 41 deg. (I'm looking at a NO973 from a celestial course I took in the mid 1980s)
What's happened to these plotting sheets? I can't find a source for them despite some fairly extensive web searches.
More important, what do people use today instead of these charts?
A long time ago the US Navy's Hydrographic Office produced a series of charts which were basically blank Mercator charts covering 3 degree intervals of latitude and 3 to 6 degrees of longitude depending on latitude. For example, NO973 covers the band from 38 deg to 41 deg. (I'm looking at a NO973 from a celestial course I took in the mid 1980s)
What's happened to these plotting sheets? I can't find a source for them despite some fairly extensive web searches.
More important, what do people use today instead of these charts?
: http://fer3.com/arc/m2.aspx?i=126674
