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 2846/18 · Icebergs2018-09-07 → 2018-09-08
    Icebergs reported in: a. B09F, 61-49S 054-30W
  2. HYDROPAC 3257/18 · Icebergs2018-09-05 → 2018-09-06
    Iceberg B31 reported in 62-57S 072-14W
  3. HYDROLANT 2825/18 · Icebergs2018-09-05 → 2018-09-06
    Icebergs reported in: a. B09F, 61-46S 053-40W
  4. HYDROLANT 2816/18 · Icebergs2018-09-04 → 2018-09-05
    Icebergs reported in: a. B09F, 61-49S 054-30W
  5. HYDROLANT 2808/18 · Icebergs2018-09-03 → 2018-09-04
    Icebergs reported in: a. B09F, 61-49S 054-30W
  6. HYDROLANT 2797/18 · Icebergs2018-09-02 → 2018-09-03
    Icebergs reported in: a. B09F, 61-49S 054-30W
  7. HYDROLANT 2789/18 · Icebergs2018-09-01 → 2018-09-02
    Icebergs reported in: a. B09F, 61-49S 054-30W
  8. HYDROPAC 3198/18 · Icebergs2018-08-31 → 2018-09-01
    Iceberg B31, reported in 62-57S 072-14W
  9. HYDROLANT 2783/18 · Icebergs2018-08-31 → 2018-09-01
    Icebergs reported in: a. B09F, 61-46S 053-40W
  10. HYDROLANT 2767/18 · Icebergs2018-08-30 → 2018-08-31
    Icebergs reported in: a. B09F, 61-49S 054-30W
  11. HYDROLANT 2754/18 · Icebergs2018-08-29 → 2018-08-30
    Icebergs reported in: a. B09F, 61-49S 054-30W
  12. HYDROLANT 2738/18 · Icebergs2018-08-28 → 2018-08-29
    Icebergs reported in: a. B09F, 61-49S 054-30W
  13. HYDROLANT 2730/18 · Icebergs2018-08-27 → 2018-08-28
    Icebergs reported in: a. B09F, 61-44S 053-58W
  14. HYDROLANT 2695/18 · Icebergs2018-08-23 → 2018-08-24
    Icebergs reported on 23 aug in: a. B15T, 58-04S 030-10W
  15. HYDROLANT 2694/18 · Icebergs2018-08-23 → 2018-08-24
    Icebergs reported on 23 aug in: a. B09F 61-44S 053-58W
  16. HYDROPAC 3081/18 · Icebergs2018-08-22 → 2018-08-23
    Iceberg B31, reported in 62-57S 072-14W
  17. HYDROLANT 2685/18 · Icebergs2018-08-22 → 2018-08-23
    Icebergs reported on 22 aug in: a. B09F, 61-46S 053-40W
  18. HYDROLANT 2672/18 · Icebergs2018-08-21 → 2018-08-22
    Icebergs reported on 18 aug in: a. B09F, 61-44S 053-58W
  19. HYDROLANT 2663/18 · Icebergs2018-08-20 → 2018-08-21
    Icebergs reported on 18 aug in: a. B09F, 61-41S 053-56W
  20. HYDROPAC 3048/18 · Icebergs2018-08-19 → 2018-08-20
    Iceberg B31, reported in 62-57S 072-14W

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