Lahrgang 83 / Nr. 101 
dichtes 30-60 cm dickes Eis, in dem gröbere 
Schollen und Presseisrücken sowie zahlreiche Risse 
vorkommen. Eine 20-40 sm breite Rinne erstreckt 
sich von Malören bis Norströmsgrund, dann weiter 
S-wärts entlang der Küste bis Norra Kvarken. Im 
Bereich MNorströmsgrund — Falkensgrund -— 
Farstugrunden treiben in der Rinne einige grobe 
Eisschollen. In der Skelleftea Bucht und E-lich von 
3juröklubb kommen Bereiche mit groben 
Eisschollen vor. 
Voraussichtliche Eisentwicklung 
Im Bereich des N-lichen Bottnischen Meerbusens 
werden in den nächsten drei Tagen schwache bis 
näßige Winde aus unterschiedlichen Richtungen 
vorherrschen. Das Eis außerhalb der finnischen 
Bottenvikküste wird sich nur langsam auflockern. 
Trotz kühler Nächte werden tagsüber deutlich 
ansteigende Lufttemperaturen den Eisrückgang in 
Norra Kvarken und im Südteil der Bottenvik 
beschleunigen, das Eis im Nordteil der Bottenvik 
wird zunehmend morsch. 
im Auftrag 
Dr. Schmelzer 
Freitag, den 07.05.2010 
2 
with heavy floes and ridges as well as with 
a1umerous cracks. A 20-40 nm wide lead stretiches 
from Malören to Norströmsgrund, then farther 
southwards along the coast to Norra Kvarken. In 
'he region Norströmsgrund — Falkensgrund — 
Farstugrunden some heavy ice floes are drifting in 
Ihe lead. In the Bight of Skellefteäa and east of 
Bjuröklubb there are some areas with heavy ice 
floes. 
Expected Ice Development 
In the region of the northern Gulf of Bothnia, the 
weak to moderate winds will come from different 
directions during the next three days. The ice off 
the Finnish coast in the Bay of Bothnia will loose 
only slowly. Despite cool nights, the significant 
increase of the day temperatures will lead to an 
accelerated ice decrease in Norra Kvarken and in 
the southern Bay of Bothnia. In the northern Bay of 
Bothnia the ice will become more and more rotten. 
By order 
Dr. Schmelzer 
Restrictions to Navigation 
ı Harbour/District At least dwt/h Ice Class Begin 
Finland Tornio, Kemi, Oulu and Raahe 2000 dwt IA 03.05. 
Kokkola and Pietarsaari 2000 dwt IA and IB 03.05. 
Vaasa 2000 dwt Land Il 03.05. 
"Karlsborg and Luleä 2000 dwt | IA 03.05. 
Haraholmen and Skelleftehamn 2000 dwt IB 03.05. 
Holmsund 2000 dwt ' 03.05. 
Information of the Icebreaker Services 
Finland 
Vessels bound for ports with traffic restrictions in the Gulf of Bothnia shall report to ICE INFO on VHF Channel 
84 when passing the Svenska Björn lighthouse. 
Icebreaker: OTSO and SISU assist in the northern Bay of Bothnia, URHO works in the southern Bay of 
Bothnia. 
Sweden 
Vessels not suitable for winter navigation, river vessels and tugs with barge can not expect governmental 
.cebreaker assistance. 
Vessels bound for ports subject to traffic restrictions in Gulf of Bothnia shall, when passing Svenska Björn 
/59°33’N 20°01’E), report to ICEINFO on VHF channel 84. 
Arrival report is to be made to ICEINFO, on VHF channel 16, when the ship is well moored, including ship’s 
ıame, ETD and next port of destination. 
Departure report is to be made to ICEINFO, on VHF channel 16, at least 6 hours before departure. 
icebreaker: YMER assists in the northern and ALE in the southern Bay of Bothnia.