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 26/01 · Icebergs2001-01-05 → 2001-01-12
    Very large iceberg B-14, eight miles by 20 miles, detected in 64-48S 176-03E on 04 jan
  2. HYDROPAC 1821/00 · Icebergs2000-12-22 → 2000-12-29
    Very large icebergs detected on 21 dec: a. C-16, nine miles by 26.0 miles, in 77-06S 167-42E
  3. HYDROPAC 1367/00 · Exercises2000-09-15 → 2000-09-22
    Hazardous operations 0952Z to 1132Z daily 20 thru 22 sep in area bound by 66-59S 156-57W, 57-18S 148-41W,…
  4. HYDROPAC 207/00 · Icebergs2000-02-02 → 2000-02-08
    Large iceberg, three miles by 14 miles, reported in 60-54S 037-16W on 31 jan
  5. HYDROLANT 386/00 · Icebergs2000-02-02 → 2000-02-08
    Large iceberg, three miles by 14 miles, reported in 60-54S 037-16W on 31 jan
  6. HYDROPAC 152/00 · Nav aids2000-01-26 → 2000-06-30
    Light, 53 meters, established in 64-12.9S 056-36.3W
  7. HYDROPAC 112/00 · Icebergs2000-01-22 → 2000-01-29
    Large iceberg, three miles by 14 miles, reported in 60-54S 037-16W at 212000Z jan
  8. HYDROPAC 85/00 · Other2000-01-15 → 2000-01-21
    Radar targets, 25 mile radius, detected between 66-34S 065-40W and 67-25S 065-55W
  9. HYDROPAC 58/00 · Icebergs2000-01-12 → 2000-01-19
    Very large iceberg, three miles by 14 miles, reported vicinity 61-23S 036-02W on 10 jan
  10. HYDROLANT 107/00 · Icebergs2000-01-12 → 2000-01-19
    Very large iceberg, three miles by 14 miles, reported vicinity 61-23S 036-02W on 10 jan
  11. HYDROPAC 40/00 · Icebergs2000-01-07 → 2000-01-14
    Very large iceberg, 10 miles by 29 miles, sighted in 67-04S 177-58W on 05 jan
  12. HYDROPAC 1094/99 · Icebergs1999-10-16 → 1999-10-22
    Large icebergs reported on 15 oct vicinity: a. 61-23S 036-02W
  13. HYDROLANT 2226/99 · Icebergs1999-10-16 → 1999-10-22
    Large icebergs reported on 15 oct vicinity: a. 61-23S 036-02W
  14. HYDROPAC 1039/99 · Icebergs1999-10-05 → 1999-10-12
    Large icebergs reported on 01 oct vicinity: a. 60-02S 047-30W
  15. HYDROLANT 2114/99 · Icebergs1999-10-05 → 1999-10-12
    Large icebergs reported on 01 oct vicinity: a. 60-02S 047-30W
  16. HYDROPAC 1017/99 · Icebergs1999-09-28 → 1999-10-04
    Large icebergs reported on 27 sep vicinity: a. 60-55S 048-36W
  17. HYDROLANT 2068/99 · Icebergs1999-09-28 → 1999-10-04
    Large icebergs reported on 27 sep vicinity: a. 60-55S 048-36W
  18. HYDROPAC 982/99 · Icebergs1999-09-22 → 1999-09-28
    Large icebergs reported on 10 sep vicinity: a. 60-55S 048-36W
  19. HYDROLANT 2020/99 · Icebergs1999-09-21 → 1999-09-28
    Large icebergs reported on 10 sep vicinity: a. 60-55S 048-36W
  20. HYDROPAC 945/99 · Icebergs1999-09-14 → 1999-09-21
    Large icebergs reported on 10 sep vicinity: a. 60-55S 048-36W

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