If you were aboard the USS Carbonero (SS-337) during any of the following dates: May & June 1965 August & September 1966 or April & May 1968, you should contact the nearest VA Medical Center and request an evaluation from their Environmental Agents Group.This was the boat that was used for the SHAD testing to determine vulnerabilities to chemical and/or biological warfare.For more information contact Ted McAnly - his email address is thmjmac@netzero.net .