NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: QMOW Days work in Navigation
From: Peter Hakel
Date: 2010 Jan 8, 22:49 -0800
Also, experience has apparently shown that doing a running fix is preferable to getting longitude from the time of LAN. This is very interesting. Does anyone know how this rule was established? Has anyone tried both methods and compared their accuracy? It is also conceivable that nobody has really tested this and the reasons are historical: i.e. the LAN is used to give latitude ONLY and thus the running fix is the next best thing to establish position.
Peter Hakel
From: "byronink@netzero.com"
To: NavList@freelists..org
Sent: Fri, January 8, 2010 7:59:07 AM
Subject: [NavList] QMOW Days work in Navigation
[parts deleted by PH]
From: Peter Hakel
Date: 2010 Jan 8, 22:49 -0800
Thank you, this is very educational.
Also, experience has apparently shown that doing a running fix is preferable to getting longitude from the time of LAN. This is very interesting. Does anyone know how this rule was established? Has anyone tried both methods and compared their accuracy? It is also conceivable that nobody has really tested this and the reasons are historical: i.e. the LAN is used to give latitude ONLY and thus the running fix is the next best thing to establish position.
Peter Hakel
From: "byronink@netzero.com"
To: NavList@freelists..org
Sent: Fri, January 8, 2010 7:59:07 AM
Subject: [NavList] QMOW Days work in Navigation
[parts deleted by PH]
Mid-morning Shoot sun to determine LOP. Plot on plotting sheet.
Noon Observe LAN. Recommend observations be started at 10 minutes before computed time of LAN, and for a couple of minutes after. Reduce sighting and determine ship's latitude. Advance mid-morning sun LOP to LAN LOP on plotting sheet to obtain running fix. Plot running fix on track chart and pass fix information to CIC/CDC. Advance sun LOPs to 1200, for 1200 Ship's Position Report.
