I've met many cool folks through diving. As a teen in the 80's, one of my highlights was being asked to tag along when my friend and instructor was invited by John Broadwater to dive one of Cornwallis' ships at Yorktown called 'The Betsy.' She was a supply ship intentionally scuttled during the Battle of Yorktown. It was an archaeological study in the 70's and 80's and had a cofferdam built around her. We were asked if we wanted to dive her literally the day before silt was pumped back into the wreck. Mr. Broadwater later went on to lead expeditions to the Monitor wreck. While I'm sure he would probably never remember this dive, I've never forgotten the honor of being able to dive such a remarkably preserved Revolutionary War wreck.
When stationed on Guam, I met a very nice Australian couple named John & Paula Bent. They had opened a dive shop called Guam Tropical Dive Station and told us about how they were searching for a Spanish treasure ship, the Nuestra Senora Zeragosa del Pilar. A short time later, it just so happens they found it. I still use the same Scuba Pro G250/MK 10 set-up I purchased from them.