NORTH ATLANTIC WINTER SEASONAL AREA for ships over 328 ft. (100m.) in length Winter– 16 December to 15 February Summer – 16 February to 15 December for ships of 328 ft (100 m.) or less in length Winter– 1 November to 31 March Summer– 1 April to31 October
NORTH PACIFIC WINTER SEASONAL ZONE Winter– 16 October to 15 April Summer– 16 April to 15 October
35° N 150° W
35° N
25° N 1 6 0 ° E
61° W
40° N 68°30’W
36° N
NORTH PACIFIC SEASONA L TROPICAL AREA Tropical– 1 April to 31 October Summer– 1 November to 31 March
13° N 60° W
13° N 13° N 105° W
TROPICAL ZONE
0°
NORTH PACIFIC SEASONAL TROPICAL AREA 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
SOUTH PACIFIC SEASONAL TROPICAL AREA Tropical– 1 April to 30 November Summer– 1 December to 31 March 1 5 0 ° W
Tropic of Capricorn
30° S
1 4 5 ° E
35° N
30° N
SUMMER ZONE
CHINA SEA SEASONAL TROPICAL AREA Tropical– 21 January to 30 April Summer– 1 May to 20 January
59° E
TROPICAL ZONE
13° N
(from Port Said)
45° E
7 0 ° E
8° N
1 4 5 13° N ° E
9° N 82° E 8° N 82° E
10° N
8° N
0° SOUTH INDIAN OCEAN SEASONAL TROPICAL AREA Tropical– 1 April to 30 November Summer– 1 December to31 March
TROPICAL ZONE
TROPICAL ZONE
50° E 51°30 E ’
15° S 51°30 E ’
20° S 26° S 75° W
SUMMER ZONE
33° S 170° W
38° N
10°30’N
NORTH ATLANTIC SEASONALTROPICALAREA Tropical– 1 November to 15 July Summer– 16 July to 31 October 10° N 10° N 58° W
11° S 150° W
11° S
SUMMER ZONE for ships over 328 ft. (100 m.) in length and WINTER SEASONAL AREA for ships of 328 ft. (100 m.) OR LESS in length Winter– 16 December to 15 March Summer– 16 March to 15 December
50° N
43°12’N
BAY OF BENGAL SEASONALTROPICALAREA Tropical– 1 December to 30 April Summer– 1 May to 30 November
TROPICAL ZONE
SUMMER ZONE 30° N
150° E
SUMMER ZONE for ships over 328 ft. (100 m.) in length and WINTER SEASONAL AREA for ships of 328 ft. (100 m.) OR LESS in length Winter– 1 December to 28/29 February Summer– 1 March to 30 November
ARABIAN SEA SEASONAL TROPICAL AREA Tropical – 1 September to 31 May Summer – 1 June to 31 August
44° N
40° N
2 0 ° W
20° N
13° N
3 ° E
9 ° E
36° N 25° W
SUMMER ZONE
1 3 0 ° W
120° E
60° N
SUMMER ZONE for ships over 328 ft. (100 m.) in length and WINTER SEASONAL AREA for ships of 328 ft. (100 m.) OR LESS in length Winter– 1 December to 28/29 February Summer– 1 March to 30 November
45° N 45° N NORTH ATLANTIC WINTER SEASONAL ZONE II Winter– 1 November to 31 March Summer– 1 April to 31 October
36° N 73° W
33° N 123° W
SUMMER ZONE
30° N
1 5 ° W
5 0 ° W
SUMMER ZONE for ships over 328 ft. (100m.) in length and WINTER SEASONAL AREA for ships of 328 ft (100 m.) or less in length Winter– 1 November to31 March Summer– 1 April to 31 October
90° E
SUMMER ZONE for ships over 328 ft. (100 m.) in length and WINTER SEASONAL AREA for ships of 328 ft. (100 m.) OR LESS in length Winter– 1 November to 31 March Summer– 1 April to31 October
60° N NORTH ATLANTIC WINTER SEASONAL ZONE I Winter – 16 October to 15 April Summer – 16 April to 15 October
60° E
33° S
’
33° S 79° W SOUTHERN WINTER SEASONAL ZONE Winter– 16 April to 15 October Summer– 16 October to 15 April
32°47 S
SUMMER ZONE
11° S
11° S
SOUTH PACIFIC 22° S SEASONAL TROPICAL AREA Tropical 1 April to 30 November 30° Summer 1 December to 31 March
S
34° S 34° S 17° E
34° S 50° W 41° S 75° W
20° S 50° E
40° W
SUMMER ZONE
’
32°47 S 72° W
20° S
Tropic of Capricorn
23°56’N
10° S 98° E 10° S SOUTH INDIAN OCEAN SEASONAL TROPICAL AREA Tropical – 1 May to 30 November Summer – 1 December 1 to 30 April 1 15° S 4 ° E
’
41° 47 S 73° 53 W
34° S 35°10' S 28° E 20° E
LOAD LINES
’
’
43° 20 S 74° 20 W 45° 45 S 74° 20 W
35°30’S 118° E
SOUTHERN WINTER SEASONAL ZONE Winter– 16 April to 15 October Summer– 16 October to 15 April
’
TF F
’
’
47° S 170° E
KEY TO ZONES/SEASONAL AREAS
T S
Tropical Zones Summer Zones Winter Seasonal Zones North Atlantic Winter Seasonal Zone II Seasonal Tropical Areas North Atlantic Winter Seasonal Area Summer Zones/ Winter Seasonal Areas Limits of Winter North Atlantic Area
W WNA
60° S
TF F T S W W NA NA
WORLD LOAD LINE AND INTERNATIONAL TIME ZONES
Tropical Fr Fresh Fresh Tropical Summer Winter W in in te te r No No rt rt h At At la la nt nt ic ic
