Southern Ocean

IHO sea area 67 · -180° to 180° E, -86° to -60° N

in force
3
last 12 months
4
since 1999
3,132
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

Icebergs2,99195%
Surveys421%
Missiles381%
Nav aids241%
Other181%
Wrecks120%
Derelicts40%
Exercises20%
Containers10%

Archive · 3,129 cancelled

  1. HYDROLANT 3782/20 · Icebergs2020-12-04 → 2020-12-05
    Icebergs reported in: a. A63, 72-13S 048-36W
  2. HYDROLANT 3758/20 · Icebergs2020-12-02 → 2020-12-03
    Icebergs reported in: a. A63, 72-13S 048-36W
  3. HYDROLANT 3744/20 · Icebergs2020-12-01 → 2020-12-02
    Icebergs reported in: a. A63, 72-13S 048-36W
  4. HYDROLANT 3735/20 · Icebergs2020-11-30 → 2020-12-01
    Icebergs reported in: a. A63, 72-13S 048-36W
  5. HYDROLANT 3726/20 · Icebergs2020-11-29 → 2020-11-30
    Icebergs reported in: a. A63, 72-13S 048-36W
  6. HYDROLANT 3713/20 · Icebergs2020-11-28 → 2020-11-29
    Icebergs reported in: a. A63, 72-13S 048-36W
  7. HYDROLANT 3695/20 · Icebergs2020-11-27 → 2020-11-28
    Icebergs reported in: a. A63, 72-19S 047-13W
  8. HYDROLANT 3684/20 · Icebergs2020-11-26 → 2020-11-27
    Icebergs reported in: a. A63, 72-19S 047-13W
  9. HYDROLANT 3666/20 · Icebergs2020-11-25 → 2020-11-26
    Icebergs reported in: a. A63, 72-19S 047-13W
  10. HYDROLANT 3647/20 · Icebergs2020-11-24 → 2020-11-25
    Icebergs reported in: a. A63, 72-19S 047-13W
  11. HYDROLANT 3635/20 · Icebergs2020-11-23 → 2020-11-24
    Icebergs reported in: a. A63, 72-19S 047-13W
  12. HYDROLANT 3628/20 · Icebergs2020-11-22 → 2020-11-23
    Icebergs reported in: a. A63, 72-19S 047-13W
  13. HYDROLANT 3620/20 · Icebergs2020-11-21 → 2020-11-22
    Icebergs reported in: a. A63, 72-19S 047-13W
  14. HYDROLANT 3610/20 · Icebergs2020-11-20 → 2020-11-21
    Icebergs reported in: a. A63, 72-19S 047-13W
  15. HYDROLANT 3598/20 · Icebergs2020-11-19 → 2020-11-20
    Icebergs reported in: a. A63, 72-19S 047-13W
  16. HYDROLANT 3566/20 · Icebergs2020-11-17 → 2020-11-18
    Icebergs reported in: a. A63, 72-19S 047-13W
  17. HYDROLANT 3555/20 · Icebergs2020-11-16 → 2020-11-17
    Icebergs reported in: a. A63, 72-19S 047-13W
  18. HYDROLANT 3547/20 · Icebergs2020-11-15 → 2020-11-16
    Icebergs reported in: a. A63, 72-19S 047-13W
  19. HYDROLANT 3541/20 · Icebergs2020-11-14 → 2020-11-15
    Icebergs reported in: a. A63, 72-38S 047-28W
  20. HYDROLANT 3531/20 · Icebergs2020-11-13 → 2020-11-14
    Icebergs reported in: a. A63, 72-38S 047-28W

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