Sun Sight Calculator — Dog Star Navigation

Observation Data

Date (UT)

Time of Sight (UT) · HH MM SS

Sextant Altitude Hs (Lower Limb)

LL

Index Error IE (arcmin — negative if off arc)

Height of Eye

DR Latitude

DR Longitude

⊙

Enter your observation and press Reduce Sight

01 Altitude Corrections · Hs → Ho

02 Almanac · GHA & Declination

03 Position & LHA

04 Computed Altitude Hc & Azimuth

Lower Limb Sun · H.O. 249

Intercept

Azimuth Zn

True bearing to Sun

Assumed Position

Plot LOP from AP

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Once installed, the app works completely offline — no internet needed at sea.