Sunday, April 14, 2013

Laptop Pub 229 Sight Reduction Calculator

Save this Pub 229 sight reduction calculator file to your laptop desktop to have an on the go anywhere means of performing celestial sight reduction.


(Z) rules to get (Zn) azimuth of body when using the calculator

L.H.A. greater than 180° Zn=Z
L.H.A. less than 180° Zn=360°–Z
L.H.A. greater than 180° Zn=180°–Z
L.H.A. less than 180° Zn=180°+Z

NGA Link:

Tuesday, April 2, 2013

Key Floatation

Save those wine corks ! One cork per key will buoy the key ring to facilitate an easy rescue from the drink. The corks also serve double duty as at hand damage control plugs for small holes.