http://vulcaniasubmarine.com/KARL%20STANLEY.htm
His web site; seems to still be doing tours, but now down to 3000 feet!
http://www.stanleysubmarines.com/
https://link.springer.com/article/10.1007/s13131-021-1893-0
http://vulcaniasubmarine.com/KARL%20STANLEY.htm
His web site; seems to still be doing tours, but now down to 3000 feet!
http://www.stanleysubmarines.com/