Regulation 51 - Enclosed Seas
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Regulation 51 - Enclosed Seas

  (1) Baltic Sea

This sea bounded by the parallel of latitude of The Skaw in the Skagerrak is included in the Summer Zones.

However, for ships of 100 metres (328 feet) and under in length, it is a Winter Seasonal Area.

  • Seasonal periods:

    WINTER: 1 November to 31 March

    SUMMER: 1 April to 31 October

  (2) Black Sea

This sea is included in the Summer Zones.

However, for ships of 100 metres (328 feet) and under in length, the area north of latitude 44°N is a Winter Seasonal Area.

  • Seasonal periods:

    WINTER: 1 December to 28/29 February

    SUMMER: 1 March to 30 November

  (3) Mediterranean

This sea is included in the Summer Zones.

However, for ships of 100 metres (328 feet) and under in length, the area bounded-

on the north and west by the coasts of France and Spain and the meridian of longitude 3°E from the coast of Spain to latitude 40°N;

on the south by the parallel of latitude 40°N from longitude 3°E to the west coast of Sardinia;

on the east by the west and north coasts of Sardinia from latitude 40°N to longitude 9°E, thence by the meridian of longitude 9°E to the south coast of Corsica, thence by the west and north coasts of Corsica to longitude 9°E and thence by the rhumb line to Cape Sicié;

is a Winter Seasonal Area.

  • Seasonal periods:

    WINTER: 16 December to 15 March

    SUMMER: 16 March to 15 December

  (4) Sea of Japan

This sea south of latitude 50°N is included in the Summer Zones.

However, for ships of 100 metres (328 feet) and under in length, the area between the parallel of latitude 50°N and the rhumb line from the east coast of Korea at latitude 38°N to the west coast of Hokkaido, Japan, at latitude 43°12'N is a Winter Seasonal Area.

  • Seasonal periods:

    WINTER: 1 December to 28/29 February

    SUMMER: 1 March to 30 November


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