Southern Ocean

IHO sea area 67 · -180° to 180° E, -86° to -60° N

in force
3
last 12 months
5
since 1999
3,133
categories
9

In force now · 3

  1. HYDROLANT 1570/26 · Icebergs2026-08-14
    Icebergs reported in the Scotia Sea and Antarctica at several coordinates; message cancels August 15, 2026, 06:32 UTC.
  2. HYDROPAC 2289/26 · Missiles2026-08-10
    Space debris hazard operations daily 13 to 26 August, 2100Z to 1800Z, in the South Pacific.
  3. HYDROLANT 1279/26 · Icebergs2026-06-30
    Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.

Longest in force

  1. HYDROLANT 1279/26 · Icebergs2026-06-30
    Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
  2. HYDROPAC 2289/26 · Missiles2026-08-10
    Space debris hazard operations daily 13 to 26 August, 2100Z to 1800Z, in the South Pacific.
  3. HYDROLANT 1570/26 · Icebergs2026-08-14
    Icebergs reported in the Scotia Sea and Antarctica at several coordinates; message cancels August 15, 2026, 06:32 UTC.

By year

99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
26

By month (all years)

J
F
M
A
M
J
J
A
S
O
N
D

By category · since 1997

Icebergs2,99295%
Surveys421%
Missiles381%
Nav aids241%
Other181%
Wrecks120%
Derelicts40%
Exercises20%
Containers10%

Archive · 3,130 cancelled

  1. HYDROLANT 628/02 · Icebergs2002-03-18 → 2002-03-25
    Icebergs reported on 17 mar: a. very large iceberg A-43C, 44 miles by 24 miles, in 61-42S 051-06W
  2. HYDROPAC 299/02 · Icebergs2002-02-17 → 2002-02-24
    Icebergs reported on feb 16: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-30S 051-42W
  3. HYDROLANT 381/02 · Icebergs2002-02-17 → 2002-02-24
    Icebergs reported on feb 16: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-30S 051-42W
  4. HYDROPAC 189/02 · Icebergs2002-01-30 → 2002-02-06
    Icebergs reported on 29 jan: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-30S 051-42W
  5. HYDROLANT 226/02 · Icebergs2002-01-30 → 2002-02-06
    Icebergs reported on 29 jan: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-30S 051-42W
  6. HYDROPAC 135/02 · Icebergs2002-01-22 → 2002-01-29
    Icebergs reported on jan 21: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-12S 051-30W
  7. HYDROLANT 159/02 · Icebergs2002-01-22 → 2002-01-29
    Icebergs reported on jan 21: a. very large iceberg A-43C, 44 miles by 24 miles, in 62-12S 051-30W
  8. HYDROLANT 113/02 · Icebergs2002-01-16 → 2002-01-22
    Very large iceberg A-43C, 44 miles by 24 miles, reported adrift in 62-12S 051-30W on 14 jan
  9. HYDROPAC 99/02 · Icebergs2002-01-16 → 2002-01-22
    Very large iceberg A-43C, 44 miles by 24 miles, reported adrift in 62-12S 051-30W on 14 jan
  10. HYDROPAC 38/02 · Icebergs2002-01-06 → 2002-01-13
    Very large iceberg A-43C, 44 miles by 24 miles, reported adrift in 62-24S 052-06W on 06 jan
  11. HYDROLANT 34/02 · Icebergs2002-01-06 → 2002-01-13
    Very large iceberg A-43C, 44 miles by 24 miles, reported adrift in 62-24S 052-06W on 06 jan
  12. HYDROLANT 3120/01 · Icebergs2001-12-08 → 2001-12-15
    Very large iceberg A-43C, 44 miles by 16 miles, reported adrift in 62-24S 052-18W on 07 dec
  13. HYDROPAC 2005/01 · Icebergs2001-12-08 → 2001-12-15
    Very large iceberg A-43C, 44 miles by 16 miles, reported adrift in 62-24S 052-18W on 07 dec
  14. HYDROPAC 1880/01 · Icebergs2001-11-21 → 2001-11-28
    Very large iceberg A-43C, 44 miles by 16 miles, reported adrift in 63-54S 052-54W on 20 nov
  15. HYDROLANT 2976/01 · Icebergs2001-11-21 → 2001-11-28
    Very large iceberg A-43C, 44 miles by 16 miles, reported adrift in 63-54S 052-54W on 20 nov
  16. HYDROPAC 1836/01 · Icebergs2001-11-13 → 2001-11-20
    Very large iceberg A-43C, 44 miles by 16 miles, reported in 63-54S 052-54W on 12 nov
  17. HYDROLANT 2925/01 · Icebergs2001-11-13 → 2001-11-20
    Very large iceberg A-43C, 44 miles by 16 miles, reported in 63-54S 052-54W on 12 nov
  18. HYDROPAC 1775/01 · Icebergs2001-11-03 → 2001-11-10
    Very large iceberg A-43C, 44 miles by 16 miles, reported in 63-54S 052-54W on 02 nov
  19. HYDROPAC 120/01 · Other2001-01-25 → 2001-01-25
    Vessel 2041 reports crewman with severe breathing difficulties in 61-43.3S 057-31.5W
  20. HYDROLANT 292/01 · Other2001-01-25 → 2001-01-25
    Vessel 2041 reports crewman with severe breathing difficulties in 61-43.3S 057-31.5W

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.