Click on the vessel to view position history. Use the tools, top right, to change the map style or view data layers.
DR rhumb line using the traverse board (dotted line) and rhumb line from GPS (solid). Some of the difference may be due to leeway and currents, although the inherent imprecision of the travserse board should be considered. The gray oval corresponds to the region where the Vieques light and the Culabrita lights were simultaneously observable - when I was on bow watch.
Noon Position (Lat and Long)
18° 35.4’ N x 66° 01.1’ W
Description of location
On slope N of Puerto Rico finishing up a hydrocast
Read a blog post by Dr. John Huth, Prof. Physics, Harvard University, summarizing his experience and navigation efforts underway.