Just get a piece of graph paper, put the lat and long on the X and Y axis scaled to the distance traveled. Put the point of departure on the left side of the sheet, and the point of arrival (lat and long) on the right side of the sheet. This aproximates the plotting sheets which are used for ocean navigation. Another way is to use a pilot chart. see: http://pollux.nss.nima.mil/pubs/pubs_j_apc_sections.html?rid=8797 Download January, and you will also see the weather conditions which can be expected. Bob Austin