View Full Version : Help with sea charts

04-27-2014, 11:41 AM
So I'm working on a sea chart and looking at example sea charts, I see radial lines coming out of various points on the map. I can't figure out what they're called, what they're for, and how to determine placement. Can anyone shed some light on this?

04-27-2014, 01:21 PM
This thread (http://www.cartographersguild.com/how-do-i/11100-rhumb-line-placement.html) should contain some useful information.