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 2528/18 · Icebergs2018-08-06 → 2018-08-07
    Icebergs reported in: a. B09F, 61-41S 053-56W
  2. HYDROPAC 2840/18 · Icebergs2018-08-05 → 2018-08-06
    Iceberg B31, reported in 62-57S 072-14W
  3. HYDROLANT 2522/18 · Icebergs2018-08-05 → 2018-08-06
    Icebergs reported in: a. B09F, 61-46S 053-40W
  4. HYDROPAC 2832/18 · Icebergs2018-08-04 → 2018-08-05
    Iceberg B31, reported in 62-57S 072-14W
  5. HYDROLANT 2516/18 · Icebergs2018-08-04 → 2018-08-05
    Icebergs reported in: a. B09F, 61-46S 053-40W
  6. HYDROLANT 2511/18 · Icebergs2018-08-03 → 2018-08-04
    Icebergs reported in: a. B09F, 61-55S 054-12W
  7. HYDROLANT 2503/18 · Icebergs2018-08-02 → 2018-08-03
    Icebergs reported in: a. B09F, 61-55S 054-12W
  8. HYDROPAC 2800/18 · Icebergs2018-08-01 → 2018-08-02
    Iceberg B31, reported in 62-57S 072-14W
  9. HYDROLANT 2485/18 · Icebergs2018-08-01 → 2018-08-02
    Icebergs reported in: a. B09F, 61-46S 053-40W
  10. HYDROLANT 2466/18 · Icebergs2018-07-31 → 2018-08-01
    Icebergs reported in: a. B09F, 61-55S 054-12W
  11. HYDROPAC 2769/18 · Icebergs2018-07-30 → 2018-07-31
    Iceberg B31, reported in 62-57S 072-14W
  12. HYDROLANT 2441/18 · Icebergs2018-07-30 → 2018-07-31
    Icebergs reported in: a. B09F, 61-46S 053-40W
  13. HYDROLANT 2429/18 · Icebergs2018-07-29 → 2018-07-30
    Icebergs reported in: a. B09F, 61-55S 054-12W
  14. HYDROLANT 2425/18 · Icebergs2018-07-28 → 2018-07-29
    Icebergs reported in: a. B09F 61-55S 054-12W
  15. HYDROLANT 2417/18 · Icebergs2018-07-27 → 2018-07-28
    Icebergs reported: a. B09F, 61-55S 054-12W
  16. HYDROPAC 2726/18 · Icebergs2018-07-26 → 2018-07-27
    Iceberg B31, reported in 62-57S 072-14W
  17. HYDROLANT 2409/18 · Icebergs2018-07-26 → 2018-07-27
    Icebergs reported on 261453Z jul in: a. B09F, 61-46S 053-40W
  18. HYDROLANT 2408/18 · Icebergs2018-07-26 → 2018-07-27
    Icebergs reported on 261400Z jul in: a. B15T, 58-05S 036-29W
  19. HYDROPAC 2715/18 · Icebergs2018-07-25 → 2018-07-26
    Iceberg B31, reported in 62-57S 072-14W
  20. HYDROLANT 2398/18 · Icebergs2018-07-25 → 2018-07-26
    Icebergs reported on 251450Z jul in: a. B09F, 61-46S 053-40W

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