ALE
Call sign: SBPQ
Built: Wärtsilä in Helsinki, Finland 1973
Length: 47.0 m
Breadth: 13.0 m
Draught: 5.40 m
Engine: Diesel electric
Engine output: 4,750 hp 
Bunker capacity: 320 m³
Propeller: 2
Speed: 14 knots
Crew: 11 persons
Contact:
Telephone: +46 (0)11-19 16 00
Fax: +46 (0)11-19 16 01
E-mail: isbrytaren.ale@sjofartsverket.se

ATLE 
Call sign: SBPR
Built: Wärtsilä in Helsinki, Finland 1974
Length: 104,6 m
Breadth:  23.8 m
Draught: 7.3-8.3 m
Engine: Diesel electric
Engine output: 22,000 hp
Bunker capacity: 2,000 m³
Propeller: 2 + 2
Speed: 19-20 knots
Crew: 20 persons
Contact:
Telephone: +46 (0)11-19 16 32
Fax: +46 (0)11-19 16 31
E-mail: isbrytaren.atle@sjofartsverket.se

FREJ
Call sign: SBPT
Built: Wärtsilä in Helsinki, Finland 1975
Length: 104.6 m
Breadth: 23.8 m
Draught: 7,3-8,3 m
Engine: Diesel electric
Engine output: 22,000 hp
Bunker capacity: 2,200 m³
Propeller: 2 + 2
Speed: 19-20 knots
Crew: 20 persons
Contact:
Telephone: +46 (0)11-19 16 22
Fax: +46 (0)11-19 16 21
E-mail: isbrytaren.frej@sjofartsverket.se

ODEN
Call sign: SMLQ
Built: Götaverken-Arendal in Göteborg 1987
Length: 107. 69 m
Breadth: 31.2 m
Draught: 7.0-8.5 m
Engine: Diesel mechanical
Engine output: 24,500 hp
Bunker capacity: 4,000 m³
Propeller: 2 i dysor
Speed: 15 knots
Crew: 19 persons
Contact:
Telephone: +46 (0)11-19 16 42
Fax: +46 (0)11-19 16 41, +46 (0)10-2393770
E-mail: oden@ib-oden.se

YMER 
Call sign: SDIA
Built: Wärtsilä i Helsingfors 1977
Length: 104.6 m
Breadth: 23.8 m
Draught: 7.3-8.3 m
Engine: Diesel electric
Maskineffekt: 22,000 hkr
Bunker capacity: 2,200 m³
Propeller:  2 + 2
Speed: 19-20 knots
Crew: 20 persons
Contact:
Telephone: +46 (0)11-19 16 12
Fax: +46 (0)11-19 16 11
E-mail: isbrytaren.ymer@sjofartsverket.se