Airbet88 17 9 transients Concept/Program: Formerly a standard unit of the class listed below; has been refitted with an englarged bow to improve icebreaking capabilities. Aviation: aft helicopter deck and hangar for 1 helicopter Concept/Program: Non-nuclear icebreakers for work in shallow coastal waters. Aviation: aft helicopter deck and hangar for 1 helicopter Concept/Program: Formerly a standard unit of the class listed below; has been refitted with an englarged bow to improve icebreaking capabilities. Aviation: aft helicopter deck and hangar for 1 Ka-32 helicopter Concept/Program: Very large icebreakers intended for service in Arctic estuaries and ot.