I've been using openCPN
for a few weeks now and I'm delighted with all the possibilities we get for free.
However, there is one little option I'd like to use, but it seems like I can't get it to work.
What I'd like to achieve is to get a CPA/TCPA for an AIS
target, but not relative to my boat position but relative to the port entry.
I'd like to know in wich order and at what time boats will enter the port.
I tried to deactivate my GPS
and manually position my boat, but when I do so, CPA/TCPA aren't available anymore.
Does anyone here know if it's possible to do such calculations?
Thanks in advance for any help!