(6) In the North Pacific

  (a) An area bounded—

 on the north by the parallel of latitude 25°N;

 on the west by the meridian of longitude 160°E;

 on the south by the parallel of latitude 13°N;

 on the east by the meridian of longitude 130°W.

• Seasonal periods:

  • TROPICAL: 1 April to 31 October

  • SUMMER: 1 November to 31 March

  (b) An area bounded—

 on the north and east by the west coast of the American continent;

 on the west by the meridian of longitude 123°W from the coast of the American continent to latitude 33°N and by the rhumb line from the point latitude 33°N, longitude 123°W, to the point latitude 13°N, longitude 105°W;

 on the south by the parallel of latitude 13°N.

• Seasonal periods:

  • TROPICAL: 1 March to 30 June and

    • 1 November to 30 November

  • SUMMER: 1 July to 31 October and

    • 1 December to 28/29 February