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. HYDROPAC 364/13 · Icebergs2013-02-05 → 2013-02-08
    Iceberg reported in 61-43.2S 054-02.4W
  2. HYDROPAC 3680/12 · Icebergs2012-12-24 → 2012-12-27
    Iceberg sighted in 60-19.5S 059-20.2W at 241130Z dec
  3. HYDROPAC 3412/12 · Nav aids2012-12-03 → 2012-12-08
    South Shetland Islands
  4. HYDROPAC 2776/12 · Other2012-10-02 → 2012-11-29
    Australia-northwest Coast
  5. HYDROPAC 2058/12 · Icebergs2012-07-20 → 2012-07-23
    Iceberg B15B, reported in 61-44S 034-05W
  6. HYDROPAC 1184/12 · Icebergs2012-04-25 → 2012-04-28
    Iceberg C19C reported in 60-04S 052-29W on 24 apr
  7. HYDROPAC 1135/12 · Icebergs2012-04-20 → 2012-04-23
    Iceberg C19C reported in 60-27S 053-07W on 19 apr
  8. HYDROPAC 1044/12 · Icebergs2012-04-11 → 2012-04-14
    Iceberg C19C reported in 60-25S 052-54W on 11 apr
  9. HYDROPAC 943/12 · Icebergs2012-04-03 → 2012-04-06
    Iceberg C19C reported in 60-51S 053-05W on 03 apr
  10. HYDROPAC 878/12 · Icebergs2012-03-27 → 2012-03-30
    Iceberg C19C reported in 60-50S 053-20W on 27 mar
  11. HYDROPAC 812/12 · Icebergs2012-03-20 → 2012-03-23
    Iceberg C19C reported in 61-20S 053-30W on 20 mar
  12. HYDROPAC 724/12 · Icebergs2012-03-13 → 2012-03-16
    Iceberg C19C reported in 61-27S 051-49W on 13 mar
  13. HYDROPAC 577/12 · Icebergs2012-02-28 → 2012-03-02
    Iceberg C19C reported in 61-27S 051-49W on 28 feb
  14. HYDROPAC 527/12 · Surveys2012-02-24 → 2012-02-28
    Oceanographic operations in progress until further notice by M/V ara puerto deseado in area bound by 64-00S…
  15. HYDROPAC 500/12 · Icebergs2012-02-22 → 2012-02-25
    Iceberg C19C, reported in 61-44S 053-10W on 21 feb
  16. HYDROPAC 420/12 · Icebergs2012-02-15 → 2012-02-18
    Iceberg C19C, reported in 62-28S 053-41W on 15 feb
  17. HYDROPAC 407/12 · Missiles2012-02-14 → 2012-02-16
    Space debris
  18. HYDROPAC 339/12 · Icebergs2012-02-07 → 2012-02-10
    Iceberg C19C 62-58S 052-48W reported on 07 feb
  19. HYDROPAC 337/12 · Missiles2012-02-07 → 2012-02-13
    Hazardous operations 1041Z to 1505Z daily 13 feb thru 13 mar in area bound by 54-38S 107-54W, 55-51S…
  20. HYDROPAC 256/12 · Icebergs2012-01-30 → 2012-02-02
    Iceberg C19 c 63-04S 051-54W reported on 30 jan

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