Simplified ice chart and reference charts

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FINNISH ICE REPORT 20.03.2019

The ice drifts northeast in the Bay of Bothnia.

In the northern Bay of Bothnia 45-65 cm thick fast ice in the archipelago. Off the fast ice, southward from Kemi 2, runs a 3-12 nautical miles wide lead covered in places with new ice and bigger floes. Farther out first to southwest of Bothnia Buoy 10-20 cm thick very close ice, then 20-50 cm thick, in places heavily ridged, very close ice. There are leads and cracks in the ice field.

In the southern Bay of Bothnia 20-40 cm thick fast ice in the archipelago. Off the fast ice edge runs a 3-10 nautical miles wide lead. Farther out 20-40 cm thick ridged big floes, and then 10-30 cm thick very close ice. There are cracks in the ice field.

In the Quark thin ice and 10-30 cm thick close ice. In the Vaasa archipelago first 25-40 cm thick fast ice to west of Ensten. Farther out there is some drifting heavy floes.

In the Sea of Bothnia 10-30 cm thick fast ice in the archipelago. Off the fast ice a 5-15 nautical miles wide zone of some drifting heavy floes.

In the Archipelago Sea 10-25 cm thick rotting ice in the inner archipelago. Along the fairways open water.

In the western Gulf of Finland 10-20 cm thick rotting fast ice in the inner archipelago.

In the eastern Gulf of Finland 20-35 cm thick fast ice in the inner archipelago. Along the fairways and in the outer archipelago, open water.

Icebreakers: Otso, Kontio, Polaris, Urho and Sisu assist in the Bay of Bothnia. Thetis and Zeus assists in the Quark.

Alterations to the assistance restrictions: From today onwards minimum ice class and deadweight required of assisted vessels:
Kaskinen, II of more than 2000 tons.
Koverhar, Lappohja, Inkoo, Helsinki, Sköldvik, Loviisa, Mussalo and Kotka restrictions are cancelled.

Assistance restrictions: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, IA of more than 4000 tons.
Raahe, Kalajoki, Kokkola and Pietarsaari, IA of more than 2000 tons.
Vaasa, IC of more than 2000 tons.
Kaskinen, II of more than 2000 tons.
Kristiinankaupunki, Pori, Rauma, Uusikaupunki, Taalintehdas, Förby, Kantvik and Hamina, II of more than 2000 tons.

Vessels bound for Gulf of Bothnia ports in which assistance restrictions apply shall, when passing the latitude 60N, report their nationality, name, port of destination, ETA and speed to ICE INFO on VHF channel 78. This report can also be given directly by phone +46 10 492 7600.

Vessels bound for ports in the Bay of Bothnia shall report to Bothnia VTS 20 nautical miles before Nordvalen lighthouse on VHF channel 67.

The traffic separation scheme in the Quark is temporarily out of use.

About the charts

The ice chart of the whole Baltic Sea (pdf) is published in the autumn twice a week (Monday and Thursday) and daily when the amount of ice increases until until ice break-up in spring. It represents current ice situation, ice breaker positions and traffic restrictions in the Baltic Sea.

The simplified charts are updated once a week at the latest on Tuesday morning. The first one represents measured level ice thicknesses, ice coverage and sea surface temperature. The reference charts represent average, 1965 – 1986, ice situation on that day (= normaali), last week´s situation, last year´s situation and the positions of the ice breakers.

Explanation of chart's finnish words

  • jäätä: ice
  • vettä: water
  • haurasta: rotten ice

 

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