Kvaerner Masa-Yards Oy

Tom Mattson

Erkki Ranki

Torsten Heideman

Magnus Backstrom

Matti Arpiainen

A relatively wide vessel is assisted through an ice field by an icebreaker having a relatively narrow hull. The icebreaker includes two steerable propulsion mechanisms at the opposite ends respectively of the hull, and the propulsion mechanisms are used to propel the icebreaker through the ice field in a direction at a substantial angle to its keel line, thereby opening in one pass of the icebreaker a passage having a width substantially greater than the waterline width of the icebreaker.

Growing community of inventors

Helsingfors, Finland

Tom Mattson