NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2010 Apr 10, 19:19 -0700
For this exercise a Plath whole horizon sextant was preset to 59 degrees 00.0 minutes then a 10 mega pixel black and white image of the Sun was taken using a 200mm fixed lens in place of the scope. Camera settings were ISO 200, 1/200s, f8.
Given:
UTC 21:10:37 10April2010
Minutes of arc per pixel for 200mm lens = .0975
Pixels from lower limb up to horizon = 67 (derived minutes are subtracted from 59°)
Assumed Latitude 34° 9.5' N
Assumed Longitude 119° 13.5' W
Height of Eye = 15ft.
Temperature = 70°F
Pressure = 1015 mb
Pixels from jetty's end up to horizon = 419
Solve:
1. Bearing to Anacapa Island.
2. Bearing to jetty light.
3. Distance in yards from jetty's end.
4. Sun azimuth.
5. Sun intercept.
6. Position of the Photographer.
Use chart number 18725 with Channel Islands Harbor insert.
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