MarineLog reports the delivery of the world’s first Icebreaker capable of running on LNG. It does appear that its capabilities using LNG alone may be limited. “The diesel-electric propulsion system includes two Wartsila 6,000 kW engines and one 1,280 kW dual fuel engine.” If, as it appears, only the 1,280 kW engine can use LNG.
I found the size of the Finnish icebreaker fleet interesting.
“Following delivery, the Finnish Transport Agency handed the vessel over to Arctia Icebreaking Oy, A Finnish state-owned company that operates a fleet of vessels that provide icebreaking services. Besides the Polaris, Arctia Icebreaking Oy operates three multipurpose icebreakers, one oil spill recovery icebreaker, three 113-ton bollard pull icebreakers, and one harbor icebreaker and towing vessel. The newest oceangoing icebreakers in the fleet, the Fennica and Nordica—two 230-ton bollard pull icebreakers—were both delivered in 1993.”
Note, the range and endurance required of these icebreakers is closer to what we think of as domestic icebreakers rather than polar icebreakers, but still an impressive fleet.
Late addition: gCaptain has a more complete description of the ship: http://gcaptain.com/arctech-helsinki-delivers-worlds-first-lng-powered-icebreaker-finnish-government/