Have just finished cruise
from San Diego
, via Marquesas
and various Pacific islands.
Have Raymarine E120 plotter, and it worked BUT
DO NOT LIKE NAVIONIC charts
Probably OK in US, but problems in out of the way places. Called in at a small Atoll in the Tuamotus called Amanu, and the Navionics
chart showed 2 main passes thru the reef. They were about 5 miles apart on the electronic chart, but looked very similar - names were slightly different.
Similarity raised my suspicions, and upshot was that one of them was non existent. I think they compiled the electronic chart from two different large scale paper charts
and just patched the two different versions of the pass onto their electronic chart.
Then entering the island of Rapa I found that the paper chart has a correction for GPS
positions - not uncommon for charts a bit off the beaten track. However when looking at the Navionics
chart it became apparent that they had actually applied the correction - BUT had applied it in the wrong ditection so that the error was doubled. Had we not had the paper chart and followed the Navionics chart we would have ended up on the reef.
Actually the French islands are pretty well beaconed - but for you "red right returning" folks, remember that almost all of the rest of the world uses the opposite international system with GREEN right returning.
Incidentally some old (2000) CMap charts showed (correctly) only the one main pass into Amanu, and had not attempted to apply any correction to the Rapa chart - so it was only out by half as much as the Navionics one.
I personally prefer the format and appearance of CMap to Navionics - and in future would steer clear of Raymarine for that reason