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 2397/18 · Icebergs2018-07-25 → 2018-07-26
    Icebergs reported on 251400Z jul in: a. B15T, 58-12S 036-33W
  2. HYDROPAC 2701/18 · Icebergs2018-07-24 → 2018-07-25
    Iceberg B31, reported in 62-57S 072-14W
  3. HYDROLANT 2391/18 · Icebergs2018-07-24 → 2018-07-25
    Icebergs reported on 241450Z jul in: a. B09F, 61-46S 053-40W
  4. HYDROPAC 2690/18 · Icebergs2018-07-23 → 2018-07-24
    Iceberg B31, reported in 62-57S 072-14W
  5. HYDROLANT 2380/18 · Icebergs2018-07-23 → 2018-07-24
    Icebergs reported on 231450Z jul in: a. B09F, 61-46S 053-40W
  6. HYDROLANT 2373/18 · Icebergs2018-07-22 → 2018-07-23
    Icebergs reported: a. B09F, 61-46S 053-40W
  7. HYDROPAC 2676/18 · Icebergs2018-07-22 → 2018-07-23
    Iceberg B31, reported in 62-57S 072-14W
  8. HYDROPAC 2637/18 · Missiles2018-07-20 → 2018-07-25
    Hazardous operations, space debris: a. 251334Z to 251416Z jul, alternate 1334Z to 1416Z daily 26 thru 28 jul…
  9. HYDROLANT 2352/18 · Missiles2018-07-20 → 2018-07-25
    Hazardous operations, space debris: a. 251334Z to 251416Z jul, alternate 1334Z to 1416Z daily 26 thru 28 jul…
  10. HYDROLANT 2348/18 · Icebergs2018-07-19 → 2018-07-20
    Icebergs reported on 19 jul in: a. B09F, 61-46S 053-40W
  11. HYDROPAC 2628/18 · Icebergs2018-07-18 → 2018-07-19
    Iceberg B31, reported in 62-57S 072-14W at 181450Z jul
  12. HYDROLANT 2336/18 · Icebergs2018-07-18 → 2018-07-19
    Icebergs reported on 181450Z jul in: a. B09F, 61-46S 053-40W
  13. HYDROPAC 2619/18 · Icebergs2018-07-17 → 2018-07-18
    Iceberg B31, reported in 62-57S 072-14W on 17 jul
  14. HYDROLANT 2324/18 · Icebergs2018-07-17 → 2018-07-18
    Icebergs reported on 17 jul: a. B09F, 61-46S 053-40W
  15. HYDROLANT 2315/18 · Icebergs2018-07-16 → 2018-07-17
    Icebergs reported in: a. B09F, 61-52S 054-22W
  16. HYDROLANT 2314/18 · Missiles2018-07-16 → 2018-07-20
    Hazardous operations, space debris: a. 201350Z to 201444Z jul, alternate 1350Z to 1444Z daily 21 thru 25 jul…
  17. HYDROPAC 2590/18 · Missiles2018-07-15 → 2018-07-20
    Hazardous operations, space debris: a. 201350Z to 201444Z jul, alternate 1350Z to 1444Z daily 21 thru 25 jul…
  18. HYDROLANT 2293/18 · Icebergs2018-07-13 → 2018-07-14
    Icebergs reported in: a. B09F, 61-46S 053-40W
  19. HYDROPAC 2544/18 · Icebergs2018-07-11 → 2018-07-12
    Iceberg B31, in 62-57S 072-14W
  20. HYDROLANT 2254/18 · Icebergs2018-07-11 → 2018-07-12
    Icebergs reported 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.