View Single Post
  #6   Report Post  
posted to rec.boats.cruising
[email protected] tsmwebb@gmail.com is offline
external usenet poster
 
First recorded activity by BoatBanter: Sep 2006
Posts: 859
Default Binoculars with compass

On Mar 14, 8:16 am, " wrote:
... Keep in mind, with deviation, the error will be between
headings so the angle between your two objects could be 7 degrees off
in this case... Good thing he's got a GPS. ...


And, while I'm in the bad habit of replying to myself and just for the
record: you can't get a fix with just the angle between two objects
and no azimuth. The angle only gives you a circle of position (or to
be fully correct two possible circular arcs of position except where
you have a transit and it becomes a line of position). With just
angles between objects you need three to get a 2d fix (unless you have
transits where you only need two). But you knew that

-- Tom.