Gentlemen,
After seeing some of the ramblings in this thread about who is or isn't correct about a term..., I'm gonna wade into this somewhat pointless discussion about Magnetic Variation & Declination.
My qualifications:
28 Years as a Royal Australian Naval Officer, Intermediate & Command Navigation Qualified & Command of a Royal Australian Naval Vessel.
Trained in Australia at the RAN School of Navigation, HMAS WATSON..
The Terms Magnetic Variation & Magnetic Declination are, as Raymo states both correct, interchangeable & during my training, within Australia used interchangeably...
To further put rest to the pointless argument I share this:
http://www.ga.gov.au/oracle/geomag/agrfform.jsp
Specifically the section on 'Components of the Magnetic Field'
I'm thinking if it's good enough for GeoScience Australia I suspect it's probably good enough for a bunch of amateurs such as ourselves...
Perhaps we can
all now focus on helping Poider (and for that matter me too) with our quest for simple & repeatable setup procedures for alignment in preparation for PA...