''Ymer'' is the fifth and last

icebreaker An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller ...

in the . She was launched in late 1976, and on 25 October 1977 she was delivered to the Swedish Navy and departed the

Wärtsilä Wärtsilä Oyj Abp (), trading internationally as Wärtsilä Corporation, is a Finnish company which manufactures and services power sources and other equipment in the marine and energy markets. The core products of Wärtsilä include technolo ...

Helsinki Shipyard bound for Stockholm, where she arrived on 3 November.

References

PDF from Swedish Maritime Administration

Newspaper article about ''Ymer''
Ships built in Helsinki 1976 ships Atle-class icebreakers {{ship-stub