Category: Navigation

Astro Navigation Pro-formas

These pro-formas are handy at leading you through the process of sight reduction.
They ensure you follow the correct process, and take you through the calculations.
They are designed to use with the standard; 
Nautical Almanac and
Sight Reduction Tables for Air Navigation (Vols 2&3).

Sun Sight Pro-Forma
Sun Sight explanation sheet (explanation of required information)
Sun Sight Overview (overview of the overall process of sun sight reduction)

Meridian Passage Pro-Forma
Planet Sight Pro-Forma
Moon sight Pro-Forma
Single Star Sight Pro-Forma 
Polaris Sight Pro-forma 

The multiple star sight pro-forma is for the '7 Selected Stars method', i.e. using the
Sight Reduction Air Tables Volume 1

Multiple Star Sight Pro-Forma 

Plotting Sheets

Plotting Sheet 1 (sheet using fixed longitude)
Plotting Sheet 2 (sheet using fixed latitude)

Category: Navigation

Methods of Position Fixing

Knowing where you are at all times is crucial to marine navigation. In this age of modern electronics, we rely heavily on GPS. However, it is foolhardy to rely totally on this singular method and a good strategy to look at alternatives to back up your electronic position.

Here are a few methods to help fix your position;


Latitude and Longitude

This is the obvious one! Switch it on, and in a few seconds your position will be displayed as a Latitude and Longitude. Remember the default datum is WGS84, check the datum menu if your not sure.

gps lat and long

Read more: Methods of Position Fixing

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