In addition, icebreaker classes have additional requirements for minimum shaft power and icebreaking capability. Nine of these are icebreakers, and one is a container ship with an icebreaking bow. In terms of icebreaking capability, this ranks her just below the largest Russian nuclear-powered icebreakers. These thrusters improve propulsion efficiency, icebreaking capability and maneuverability of the vessel. The Arctic icebreaking LNG tanker MV "Eduard Toll" is named after him. Routine icebreaking is usually handled by the Tug & Lighter Company. The ferries pioneered concepts in ship design and icebreaking techniques. "Svalbard" was commissioned in 2002 as the first icebreaking vessel of the Coast Guard. Xue Long () is a Chinese icebreaking research vessel. A new icebreaking oil spill response vessel was named "Louhi" on 8 March 2011. Prior to ocean-going ships, icebreaking technology was developed on inland canals and rivers. Sevmorput () is a Russian nuclear-powered icebreaking LASH carrier and container ship. It also gave Diefenbaker's name to a human rights award and an icebreaking vessel.