[Public-List] navigation (fwd)

Michael Grosh via Public-List public-list at lists.alberg30.org
Tue Feb 2 05:24:11 PST 2016


Jonathan gives excellent advice.
A few things I'll add:
Declination = Variation so you already have that down. Deviation, 
however... you with boat # 219 I can speak with some authority: the 
factory installed compass on the deck bridge is not a confidence 
builder. With the boat docked, note change in heading when engine is 
running and not.
It sounds like you are interested in what is known as set and drift 
solutions. It is a very satisfying skill to own, Power Squadron (as 
Jonathan suggested) course will prevent a lot of frustration. However, 
the skill is mostly academic on an Alberg. Without a real chart table 
seat of pants navigation in the cockpit doesn't really translate. 
Brushing off the old High School Algebra and becoming one with 
Speed=distance/time is just the start=:0
Having said that, my experience is holding a course in an Alberg within 
5 degrees of your rhumbline is as good as you are going to get 
(especially sailing, and i like to believe that is what i have a 
sailboat for). Add in 2-3 degrees leeway and at some point your dead 
reckoning becomes wild optimism. A pair of binoculars (a built in 
pelorus is a major improvement) becomes the most valuable nav. tool-on 
the Chesapeake Bay, anyway. That's why I live here.

Michael Grosh
#220





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