^Oceanology International and Offshore Technology 1971 The sea switch is designed to use a minimum of power while submerged and to provide positive and continuous operation of the unit when surfaced.
^The Work Boat - Volume 52 - Page 29 1995 "The Sea Switch is self testing & cleaning. It also has the capabilities of becoming a complete Overfill, Shutdown, and Alarm System."
^The Patent Office Record: La Gazette Du Bureau Des Brevets Canada. Patent Office - 1971 "A probe containing a property sensing element and two electrodes of a “sea switch” is deployed from the airborne vehicle and is electrically connected by a three-wire cable to a bridge measuring .."
