Tracks names are date formatted as YYMMDDHHMM. For example, the file name for the track that began at 8:30AM on Nov 6, 2025 is 2511060830.
Use the Anchorages & Marinas files to associate track locations with their filenames. Some entries in Anchorages & Marinas files will not have an associated track. Some may have two or more tracks.
Each track has two files - GPX and KML formats. GPX tracks can be downloaded to chart plotters. KML tracks can be opened in Google Earth.
KML tracks contain depths at each track point. Depths are graphically depicted in a picket fence format. Picket positions correspond to track points. Picket heights correspond to the depth at that point. A picket’s lat/lon location and depth is displayed when a picket is clicked. Yellow pickets correspond to depths greater than 10 ft. Red pickets correspond to depths 10ft or less.
Depths in US track points are tidally compensated. Depths in Canada track points are not.
Position and depth data in the tracks may not always be accurate. Mistakes have been made. USE AT YOUR OWN RISK.
Picket fence track in Google Earth. This shows Zora’s track in the Absecon Inlet, Atlantic City. Picket heights are proportional to depth. Red pickets represent depths 10 ft or less.