NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: H.O. 229/249: publication dates
From: Greg R_
Date: 2011 Mar 24, 12:47 -0700
From: Greg R_
Date: 2011 Mar 24, 12:47 -0700
Looks like this has been discussed before (2002): H.O. 249 when introduced http://www.i-DEADLINK-com/lists/navigation/0203/0030.html In answer to the question of when HO-249 tables were first published, I have dug up the following bibliography: Aircraft Navigation Manual (HO-216) - 1941- says that HO-208, HO-211, and HO-214 are the only tables used for sight reduction. Air Navigation - P.V.H. Weems- 1943- says that HO-214 and (pushing their own product, Weems Line of Position Book), are the main methods used for air navigation. They mention that the RAF Air Navigation Tables (A.N.T.) are published in the US as HO-218, with no further explanation. Air Navigation- Army Air Force - 1944- says HO-218 is the primary means of air sight reduction. It says HO-218 has HC values listed with respect to LHA Star and DR Lat. for 22 "selected stars". These exist in the first half of each volume, with the last half being like HO-214. Each volume covered 5 deg of Lat. Duttons- Tenth Edition -1951- mentions that HO-218 and HO-249 are similar to HO-214 in many ways. So, this is the first mention I could find for HO-249. It looks like in the 7 years between 1944 and 1951 someone took the selected stars from 218 and incorporated them into one volume 1 of HO-249. Maybe someone else has additional references that can pinpoint the first HO-249. Ken Gebhart On 3/24/2011 8:33:45 AM, Frank Reed (frankreed@historicalatlas.com) wrote: > When were these first published? Thanks. > -FER > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ----------------------------------------------------------------