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 3982/20 · Icebergs2020-12-26 → 2020-12-27
    Icebergs reported in: a. A63, 71-45S 052-58W
  2. HYDROLANT 3974/20 · Icebergs2020-12-25 → 2020-12-26
    Icebergs reported in: a. A63, 72-13S 048-36W
  3. HYDROLANT 3968/20 · Icebergs2020-12-24 → 2020-12-25
    Icebergs reported in: a. A63, 72-13S 048-36W
  4. HYDROLANT 3960/20 · Icebergs2020-12-23 → 2020-12-24
    Icebergs reported in: a. A63, 72-13S 048-36W
  5. HYDROLANT 3947/20 · Icebergs2020-12-22 → 2020-12-23
    Icebergs reported in: a. A63, 72-13S 048-36W
  6. HYDROLANT 3938/20 · Icebergs2020-12-21 → 2020-12-22
    Icebergs reported in: a. A63, 72-13S 048-36W
  7. HYDROLANT 3930/20 · Icebergs2020-12-20 → 2020-12-21
    Icebergs reported in: a. A63, 71-51S 051-37W
  8. HYDROLANT 3902/20 · Icebergs2020-12-17 → 2020-12-18
    Icebergs reported in: a. A63, 71-51S 051-37W
  9. HYDROLANT 3894/20 · Icebergs2020-12-16 → 2020-12-17
    Icebergs reported in: a. A63, 71-51S 051-37W
  10. HYDROLANT 3881/20 · Icebergs2020-12-15 → 2020-12-16
    Icebergs reported in: a. A63, 71-51S 051-37W
  11. HYDROLANT 3854/20 · Icebergs2020-12-14 → 2020-12-15
    Icebergs reported in: a. A63, 71-51S 051-37W
  12. HYDROLANT 3842/20 · Icebergs2020-12-13 → 2020-12-14
    Icebergs reported in: a. A63, 72-13S 048-36W
  13. HYDROLANT 3840/20 · Icebergs2020-12-12 → 2020-12-13
    Icebergs reported in: a. A63, 72-13S 048-36W
  14. HYDROLANT 3836/20 · Icebergs2020-12-11 → 2020-12-12
    Icebergs reported in: a. A63, 72-13S 048-36W
  15. HYDROLANT 3828/20 · Icebergs2020-12-10 → 2020-12-11
    Icebergs reported in: a. A63, 72-13S 048-36W
  16. HYDROLANT 3818/20 · Icebergs2020-12-09 → 2020-12-10
    Icebergs reported in: a. A63, 72-13S 048-36W
  17. HYDROLANT 3810/20 · Icebergs2020-12-08 → 2020-12-09
    Icebergs reported in: a. A63, 72-13S 048-36W
  18. HYDROLANT 3803/20 · Icebergs2020-12-07 → 2020-12-08
    Icebergs reported in: a. A63, 72-13S 048-36W
  19. HYDROLANT 3800/20 · Icebergs2020-12-06 → 2020-12-07
    Icebergs reported in: a. A63, 72-13S 048-36W
  20. HYDROLANT 3789/20 · Icebergs2020-12-05 → 2020-12-06
    Icebergs reported in: a. A63, 72-13S 048-36W

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