



A design engineer tells representatives of the Main Directorate of the Northern Sea Route about a new design of a tracked icebreaker.
A drawing of a tracked icebreaker.
A designer approaches a test stand with a model of a tracked icebreaker installed on it.
A laboratory employee turns on the stand.
A model of a tracked icebreaker overcomes ice; a design engineer gives explanations.
A model of a tracked icebreaker in action.
1941
Leningrad