View Tidal Current Patterns Evolve in OpenCPN

[@Cranston0]

Good trick. Never noticed it did that when overlaying a grib.

[@dougbritton1624]

If you add the otCurrent Plugin, it will do exactly what you seeking. Step through currents every hour or less.

[@StarpathNav]

Thanks very much. That is a great plug in; also lets us get historic or future data in an easier way. I am running the Mac version, and gave up too soon! It seems you need to find (unpack the app folder) and then duplicate the harmonics files to another location and then reassign to new location... or maybe i am missing something, Then the only snag i see is, it seems my Mac ver does not respond to the arrow size control, so i am left with very small arrows. I am still working on that. Just checked the PC version and it works great there! No snags. Thanks again. I should have checked the PC version first.