Modern Offshore Navigation


ASA 117 + how to cross an ocean

Three day class:

1. ASA 107 material:

Noon sight

Nautical almanac/Declination tables/H.O. Lookups

Position relative to the sun and associated calculations.

2. Sextant intro, how to.

Day on the water doing three sights. 11 am, noon, 2 pm.

Universal plotting chart, relative to local chart.

Route planning, celestial dead reckoning 

Weather effect on route planning.

3. Modern navigation using Expedition

Sources of input data

Using sail Info/sail mail.

SSB/Satellite email connectivity

Putting miles in the bank

Weather regions

Weather fax on software defined radio

Uploading grubs and calculating daily waypoints