LCVP or Higgins Landing Craft. If you ever saw Saving Private Ryan. This is the type of boat that was used during the D-Day seen hitting the beaches at the start of the film. I did this dive during June 2007 when the algae was in full bloom. Visibility in the lake at that time was about 15ft. During Fall and Winter months you could get upwards of 80-100ft. At the time this craft was 70 feet down.