Built in 1963 by a private citizen to explore the Andria Doria wreck. Sunk at launching...
Submarines - Civilian, Sea - Shipwrecks
"The crane engineer lowered the sub completely into Coney Island Creek, disregarding Bianco's instructions. Bianco had removed the ballast from one side of the sub to save money, since the cost of launch was calculated by the pound, and the engineer was told to lower it only partly into the creek. Like the ocean liner it was supposed to help salvage, the Yellow Submarine listed severely in the water and couldn't be launched. Biano later refilled the ballast and tethered the sub, but his backers' enthusiasm waned, and he could never return to the project. Eventually some of the sub's parts were stolen, and it got loose from its moorings in 1981."