Update on the Chesapeake bay expedition. We’ve been playing with fish finders, which have come very far indeed, for use in wreck surveys and pre-dive planning.
Siege of Yorktown, HMS Betsy. In 1988, an excavation erected and then collapsed a cofferdam over the wreck. We want to check it out and learn more about the +50 unidentified wrecks that still lay buried in the York River! The first image is from National Geographic, June 1988, the circular sonar is from a recent survey from JRS Explorations. The bottom 2 images are from our Garmin echomap 44cv.
Have many of you used fish finders in this way? If so, can you help with image analysis?