Gentlemen,
In a pretty routine calculation I faced a problem which forced me to redo that calc three times. Let me explain myself:
Three sighting of Sun and three sightings of Moon. Regular fix. Supposed to be. Except one nuance: The lat is a whole number of degrees and 30 minutes. No problem. The question is what App.Lat. to select: 30 minutes less or 30 minutes greater to get a whole number for the entry into Pub.229. Getting suspicious results in both attempts I decided to interpolate data for Hc and Z between two neighboring Lats. Then the fix appeared to make sense.
I checked the difference between Hc in adjoining columns. The delta is APPROXIMATELY the same.
The bottom line: I just like to share this small occurence. Am sure that most of you are familiar with this issue and have no problems. But anyway, decided to share it.
By the way, I understand that there is no direct proportionality between data in Pub.229, because all of it are solutions of navigational triangle using spherical trigs.
Thank you
In a pretty routine calculation I faced a problem which forced me to redo that calc three times. Let me explain myself:
Three sighting of Sun and three sightings of Moon. Regular fix. Supposed to be. Except one nuance: The lat is a whole number of degrees and 30 minutes. No problem. The question is what App.Lat. to select: 30 minutes less or 30 minutes greater to get a whole number for the entry into Pub.229. Getting suspicious results in both attempts I decided to interpolate data for Hc and Z between two neighboring Lats. Then the fix appeared to make sense.
I checked the difference between Hc in adjoining columns. The delta is APPROXIMATELY the same.
The bottom line: I just like to share this small occurence. Am sure that most of you are familiar with this issue and have no problems. But anyway, decided to share it.
By the way, I understand that there is no direct proportionality between data in Pub.229, because all of it are solutions of navigational triangle using spherical trigs.
Thank you