Isbrytning med svävarfarkoster
Consumer report ("avnämarrapport" in Swedish) for a research foundation (Styrelse för Teknisk Utveckling STU Stockholm eller Transportforskningsdelegationen TDF Stockholm).
A comment: As was the praxis during this (early) period of time at Chalmers University of Technology, as well as probably at some other universities. This means that frequent and vast academic publication by means of e.g. conference papers and refereed contributions to scientific journals was almost unheard of. At least so for some of the applied science disciplines (today are the situation indeed very different) (i.e. earlier was the publication in many respects focused on trying to satisfy the executive administrator the research foundation in question).
vessels for breaking the ice
external transportation regarding icebreaker