Once regular routes were established, they followed a Rhumb line. This is a line connecting two points that can be tracked by following a specific magnetic heading. It is not a straight line but is very simple to navigate assuming you got started right and kept to the proper heading.
Latitude has never been a problem. Longitude has always been the issue. I recommend the book “Longitude” by Sorbel if you really want a good read on the subject. https://books.google.com/books?id=lW8DYSPa6fEC&printsec=frontcover&dq=longitude+sorbel&hl=en&sa=X&ved=0ahUKEwj4k_7b5pjiAhWOUt8KHffcA-MQ6AEIKjAA From: Adam Moffett Sent: Monday, May 13, 2019 8:57 AM To: af@af.afmug.com Subject: Re: [AFMUG] Antenna Aligner I wonder if sailing ships would follow the compass during the day and true up with Polaris at night. I know the difference was less pronounced then, but it must have still been there and they must have noticed. Maybe if you're target is to hit the right continent then it ain't really a problem. -Adam On 5/10/2019 7:11 PM, ch...@wbmfg.com wrote: Probably... For scouts, they normally are not that into absolute bearings and headings. More just NNE type of accuracy. But yeah, West coast magnetic variations/declination are much more pronounced than areas where the folks that live on the agonic line like you. Main and NW Washington state are 20 degrees off. If you learn to fly a plane in the Pacific Northwest back in the day of compass and sectional, it was an important factor. As I recall VOR stations and victor airways are on a magnetic heading vs true. But they don’t adjust VOR stations for magnetic field drift after they are installed. I think the FCC is all about true north. And of course you can get a pretty good heading off the North star or Orions belt. Can’t remember which of the three stars is due East/West. From: Ken Hohhof Sent: Friday, May 10, 2019 4:58 PM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] Antenna Aligner You’re not making me less confused. Back when I was teaching cub scouts to use a compass, was I teaching them a bunch of crap? From: AF mailto:af-boun...@af.afmug.com On Behalf Of SmarterBroadband Sent: Friday, May 10, 2019 5:48 PM To: 'AnimalFarm Microwave Users Group' mailto:af@af.afmug.com Subject: Re: [AFMUG] Antenna Aligner 14 for me. From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of ch...@wbmfg.com Sent: Friday, May 10, 2019 3:18 PM To: 'AnimalFarm Microwave Users Group' mailto:af@af.afmug.com Subject: Re: [AFMUG] Antenna Aligner It is only 1 or 2 degrees where you live but it is probably 15 degrees where Bill lives. From: Ken Hohhof Sent: Friday, May 10, 2019 4:14 PM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] Antenna Aligner Whenever I see the difference between magnetic and true north I get confused about which one we’re supposedly using and decide 1 or 2 degrees doesn’t matter on a 90 degree sector. Plus I get lazy and just align the sectors to the tower faces or the roads. From: AF <af-boun...@af.afmug.com> On Behalf Of Daniel White Sent: Friday, May 10, 2019 4:37 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] Antenna Aligner I've used the 3Z and Sunsight ones some. It was a few years ago though. Really it boils down if you want the screen on the device or to use your phone or sometheneing else. I'd probably go with Sunsight personally, but either are a good investment. Daniel White Co-Founder - Business Development & Operations direct: +1 (702) 470-2766 SmarterBroadband wrote on 5/10/19 15:28: Thinking of getting an Antenna Aligner for Sector and Dish alignment. Choices seem to be Multiwave Smart Aligner 3Z Telecom RF Vision Sunsight Anyone have experience of any of these? Thanks Adam ------------------------------------------------------------------------------ -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com ------------------------------------------------------------------------------ -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
