I noticed that in recent betas the Split and Extend (join) functionality for routes and tracks is not present.
While I am not attached to this particular user interface and implementation, I would gladly see it there, or an equivalent replacement...
When planning, I use the Split route
a lot for cutting off the part of the route
that has already been covered, to keep the starting point close to current
position. This is in context of long passages, which I plan with GRIB forecasts (using custom 2.5.1318). The route in this case is not an exact route to follow by autopilot
, just an approximation to serve as basis for looking at wind-tide-time forecast
for subsequent waypoints.
Such routes are too long (too many waypoints) to build by hand... I first draw a track along the planned passage
, I convert it to route with RM "route from track", what gives me evenly-spaced waypoints roughly coinciding with subsequent GRIB frames. Then, as the voyage progresses, I cut off and discard the initial part of the route...
The Extend function is critical for organizing recorded tracks. On a smaller boat, for energy saving, the laptop
is often switched off when offshore
in deep water
. Still, I like to have the accurate track recorded, so I do it with a small Holux box, and a Garmin
handheld, which I import
into OCPN periodically, when convenient. I could never master the techniques for managing track rollover on these devices, so I usually end up with three sets of tracks, in principle all true, but each one has holes and overlaps with other tracks in different places. To make a single
complete track by hand, selecting, cutting and glueing the pieces is not easy at all.
First I load all tracks. Then I select one last part, and keep Extending it blindly until no more possibility exists for extension. Some holes will still remain, but it is easier to look at each one and repair what can not be joined automatically.
This process is far from perfect, but without split and extend it is very hard to have a nice record
of a long voyage.
Using external tools for planning and reviewing, nice as they are, is not really as convenient, so I hope for such built-in functionality in the future.