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 2528/18 · Icebergs2018-07-10 → 2018-07-11
    Iceberg B31, in 62-57S 072-14W
  2. HYDROLANT 2242/18 · Icebergs2018-07-10 → 2018-07-11
    Icebergs reported in: a. B09F, 61-46S 053-40W
  3. HYDROLANT 2232/18 · Icebergs2018-07-09 → 2018-07-10
    Icebergs reported in: a. B09F, 61-52S 054-22W
  4. HYDROPAC 2499/18 · Icebergs2018-07-08 → 2018-07-09
    Iceberg B31, in 62-57S 072-14W
  5. HYDROLANT 2220/18 · Icebergs2018-07-08 → 2018-07-09
    Icebergs reported in: a. B09F, 61-46S 053-40W
  6. HYDROPAC 2492/18 · Icebergs2018-07-07 → 2018-07-08
    Iceberg B31, in 62-57S 072-14W
  7. HYDROLANT 2209/18 · Icebergs2018-07-07 → 2018-07-08
    Icebergs reported in: a. B09F, 61-46S 053-40W
  8. HYDROLANT 2207/18 · Icebergs2018-07-07 → 2018-07-10
    Iceberg reported in 62-05S 063-10W
  9. HYDROPAC 2479/18 · Icebergs2018-07-06 → 2018-07-07
    Iceberg B31, in 62-57S 072-14W
  10. HYDROLANT 2198/18 · Icebergs2018-07-06 → 2018-07-07
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  11. HYDROPAC 2471/18 · Icebergs2018-07-05 → 2018-07-06
    Iceberg B31, in 62-57S 072-14W
  12. HYDROLANT 2186/18 · Icebergs2018-07-05 → 2018-07-06
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  13. HYDROPAC 2458/18 · Icebergs2018-07-04 → 2018-07-05
    Iceberg B31, in 62-05S 063-10W
  14. HYDROLANT 2171/18 · Icebergs2018-07-04 → 2018-07-05
    Icebergs reported in: a. BO9F, 61-52S 053-44W
  15. HYDROLANT 2160/18 · Icebergs2018-07-03 → 2018-07-04
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  16. HYDROLANT 2151/18 · Icebergs2018-07-02 → 2018-07-03
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  17. HYDROLANT 2143/18 · Icebergs2018-07-01 → 2018-07-02
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  18. HYDROLANT 2121/18 · Icebergs2018-06-29 → 2018-06-30
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  19. HYDROLANT 2103/18 · Icebergs2018-06-28 → 2018-06-29
    Icebergs reported in: a. BO9F, 61-46S 053-40W
  20. HYDROLANT 2091/18 · Icebergs2018-06-27 → 2018-06-28
    Icebergs reported in: a. BO9F, 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.