Using GE2KAP free program, just zoom in on GE where you like to sail and make a chart. Used it in Papua New Guinea 2014 very very accurate, love it. Just import the files to open cpn and they come up as blue at the buttom, cm 93 is yellow , easy to change between GE and cm93
Yacht Seagoon is sailing to Milne Bay Papua New Guinea 1st May 2013. This year I am installing Solar panels and LED lights in the villages.