I've just started using Open CPN
on a Mac with OS Catalina
version 10.15.7. There was no problem with creating waypoints and routes between San Pedro Harbor and Catalina Island
, but I ended up with inconsistencies between what was listed on my route
printout for courses between waypoints and what was described when placing the cursor over the legs on the digital chart.
Also, when checking leg courses between the digital chart and Paper chart,
(Maptech #129, Los Angeles & Santa Monica Bay), I found major inconsistencies on course directions. I thought perhaps I wasn't calculating magnetic variations accurately, but found that "True" courses were different as well. Even a plotted position ended up being slightly different on the digital chart compared to the paper position - .4'.
Twisted Kilt 2