(a) The North Atlantic Winter Seasonal Zone I
lies within the meridian of longitude 50°W from the coast of Greenland
to latitude 45°N, thence the parallel of latitude 45°N to
longitude 15°W, thence the meridian of longitude 15°W to latitude
60°N, thence the parallel of latitude 60°N to the Greenwich
Meridian, thence this meridian northwards.
(b) The North Atlantic Winter Seasonal Zone II
lies within the meridian of longitude 68°30'W from the coast of
the United States to latitude 40°N, thence the rhumb line to the
point latitude 36°N, longitude 73°W, thence the parallel of
latitude 36°N to longitude 25°W and thence the rhumb line
to Cape Toriñana.
Excluded from this zone are the North Atlantic Winter Seasonal
Zone I, the North Atlantic Winter Seasonal Area and the Baltic Sea
bounded by the parallel of latitude of the Skaw in the Skagerrak.
The Shetland Islands are to be considered as being on the boundary
of the North Atlantic Winter Seasonal Zones I and II.