The jury said that the film was awarded for its "convincing depiction of the euphoric feeling of being immersed in an elemental environment."
The British film had previously won the FIPRESCI prize at this year's Venice Film Festival.
Other major winners included Christian Sønderby Jepsen's family drama "The Will," which won the Danish:Dox Award celebrating homegrown documentary, and Philippe Grandieux's "It May Be That Beauty Has Strengthened Our Resolve," which took the New:Vision Award (an award intended to promote the experimental documentary in the field between documentary and art).
Full list of winners below.
Two Years at Sea
Winner: It May Be That Beauty Has Strengthened Our Resolve - Masao Adachi
Special Mention: Führung
NORDIC DOX AWARD
Crulic - the Path Beyond
Winner: The Will
Special Mention: 1/2 Revolution
SOUND & VISION AWARD
Grandma Lo-Fi: The Basement Tapes of Sigrídur Níelsdóttir
POLITIKEN'S AUDIENCE AWARD
DOC ALLIANCE AWARD
The Good Life