SI further explanation of the PVC Tree
Here is a little further explanation of the SI image of the PVC tree I put out. The pink arrows are pointing to a little ledge about 2 foot high. The yellow circles are the sonar shadows from the 2 PVC trees we put on top of the ledge. The red circle is the actual PVC tree. I have learned when using SI you must take into account the sonar shadow to tell you how high the cover sticks up and how thick the cover is but when marking the waypoint you must mark the actual cover to get your point accurate. Hope this helps and you guys enjoyed the little exercise.