MSV Botnica

Botnica arriving in Helsinki on 13 March 2007. The explosion-welded stainless steel ice belt is visible near the waterline.
History
Finland
Name:	Botnica
Owner:	Finnish Maritime Administration (1998–2004) Finstaship (2004–2010) Arctia Offshore (2010–2012)
Port of registry:	Helsinki,  Finland
Ordered:	February 1997
Builder:	Finnyards Ltd., Rauma, Finland
Cost:	FIM 303 million
Yard number:	421
Laid down:	2 September 1997
Launched:	20 February 1998
Completed:	1 June 1998
In service:	1998–2012
Identification:	Call sign: OJAK IMO number: 9165877 MMSI number: 230904000
Fate:	Sold to Estonia in 2012
Estonia
Owner:	Port of Tallinn (2012–)
Operator:	TS Shipping
Port of registry:	Tallinn,  Estonia
Acquired:	28 November 2012
Identification:	Call sign: ESJV IMO number: 9165877 MMSI number: 276805000
General characteristics
Type:	Icebreaker, platform supply vessel
Tonnage:	6,370 GT 1,911 NT 2,890 DWT (offshore)
Length:	96.70 m (317.3 ft)
Beam:	24.00 m (78.7 ft)
Draught:	7.20–7.80 m (23.6–25.6 ft) (icebreaker) 8.50 m (27.9 ft) (offshore)
Depth:	11.70 m (38.4 ft)
Ice class:	DNV ICE-10 Icebreaker
Installed power:	12 × Caterpillar 3512B DITA (12 × 1,258 kW)
Propulsion:	2 × ABB Azipod VI1600A (2 × 5 MW) 3 × Brunvoll bow thrusters (3 × 1,150 kW)
Speed:	16.5 knots (30.6 km/h; 19.0 mph) (max) 12 knots (22 km/h; 14 mph) (service) 8 knots (15 km/h; 9.2 mph) in 80 cm (31 in) ice
Crew:	19 (winter) 23 (summer) Accommodation for 72 personnel
Aviation facilities:	Helipad

MSV Botnica is a multipurpose offshore support vessel and icebreaker built by Finnyards in Rauma, Finland, in 1998. She was the newest and technically most advanced state-owned icebreaker of Finland until 2012, when she was sold to the Port of Tallinn for 50 million euro.Botnica is used as an escort icebreaker in the Baltic Sea during the winter months, but carries out subsea and offshore construction works worldwide during the open water season.

The maximum overall length of Botnica is 96.70 metres (317.3 ft) and her length between perpendiculars is 77.51 metres (254.3 ft). The hull has a moulded breadth of 24 metres (78.7 ft) and depth of 11.7 metres (38.4 ft). The draught is 7.20 to 7.80 metres (23.6 to 25.6 ft) when the ship is acting as an icebreaker and 8.50 metres (27.9 ft) in offshore supply operations. The gross tonnage of Botnica is 6,370, net tonnage 1,911 and deadweight tonnage 2,890 tons. The light displacement of Botnica, i.e. the weight of the ship without consumables, cargo and crew, is 5,880 tons. Her loaded displacement varies according to the loading condition.

Botnica is classified by Det Norske Veritas with a class notation 1A1 ICE-10 Icebreaker SF HELDK RPS E0 DYNPOS-AUTRO DK(+) HL(1.8). Her ice class, ICE-10 Icebreaker, means that she is designed to break ice up to 1 metre (3.3 ft) thick without limitations to ramming. To improve the ship's maneuverability in ice her hull is wider at the bow than in the stern. These "reamers" increase the width of the ice channel and reduce friction between the hull and ice. In addition the hull has an explosion-welded stainless steel ice belt that reduces friction and protects the steel plates from abrasion at the waterline. The hull is coated with low-friction Inerta 160 epoxy paint.