Word of warning - don't take for gospel everything you read on the internet.
http://valoratsea.com/
Some of the information in that website is completely wrong. I tried to contact the webmaster but the email link no longer works. One glaring error, Porpoise, Salmon, Sargo, Tambor, and Gar all were built with 4 engines, not two. Narwahl was originally built with two but later modified for 4. So before quoting any website as an authoritative source, check with several websites to see if there are discrepancies.
