Here was the best classroom at Cal-Poly chalkboard and all we were always ready to learn some dive physics or get the map to the next cool location! Otto's motto was "When you have a good thing going keep your mouth shut!"
What he meant by this was when you find the glory hole don't tell everyone otherwise the next time you go it will all be gone! If you buddied with someone and they took you to their spot you didn't tell anyone or take anyone there without asking the buddy who took you there in the first place!

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Divers Cove Laguna California 1974