THIS POST REPLACES THE IMAGES LOST IN BOS MIGRATION TO ITS NEW PLATFORM
(RE-POSTED NOW AT MEMBER REQUESTS)
BOS Platform doesn't permit adding images to the original thread so had to start this new thread.
LINK TO ORIGINAL THREAD
The images are from an article I wrote for the July/August 1983 AWSA Water Skier magazine.
We used this course from 1975 to 1992, when we moved away from this lake.
Quick Review: This submersible course was originally installed in 1975 on Christmas Lake in Minnesota. Later improvements added an electric winch with a dash-mounted radio remote control in our Ski Nautique and in our house. Another later improvement added 2" PVC spreaders at the sub buoy LEVEL to improve the width accuracy of the course.
Was it really the worlds first submersible course ? Can't be sure, but I later learned that Mike Suyderhoud patented his submersible cable course in 1976, a year after ours was installed.
From July 1983 WaterSkier magazine - The red ball in the middle of the course was added later to offset any friction in the line to the winch on shore that could distort the course by a few inches.
This is how I made the center anchor in 2021. To avoid handling a 700 pound anchor I poured the concrete with the wood form pre-staged on the shoreline, so it could be pulled into position after it was setup. Used 4" PVC this time instead of 3" PVC