National Geographic : 1938 Oct
Photograph from Wide World ACROSS THE GULF OF FINLAND AN ICE-BREAKER CRASHES ITS PATH THROUGH A GREAT WHITE WAY TO TALLINN, ESTONIA Following in the channel of open water plies a procession of ships bound for the harbor. The biggest ice-breaker inFinland isthe Jiidkarbu. The engines ofthepower ful boat develop 9,200 horsepower. It can forge through clear ice three feet thick and smash through pack-icebelts from eight toten yards inonedrive.