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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Longitude by lunar altitudes
From: Bob Jennings
Date: 2025 Jun 21, 18:04 -0700
From: Bob Jennings
Date: 2025 Jun 21, 18:04 -0700
I have been trying to work through the procedure for calculating longitude explained by Dr. George Bennett in the Journal of The Institute of Navigation Vol.53, No.2, Summer 2006. Whilst I understand the concept I cannot replicate Dr.Bennett's Intercepts as shown in the example. I guess the assumed longitude has to be the exact value of Lo run up from star fix. I use USNO clone by Frank Reed to get Hc but try as I might I cannot replicate the IF shown. Does anyone know of a more detailed description of this worked example? I am probably making a silly error!
Thanks for any comments or advice
Bob Jennings
