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 984/19 · Icebergs2019-03-28 → 2019-03-29
    Icebergs reported in: a. B15T, 54-33S 027-06W
  2. HYDROLANT 983/19 · Icebergs2019-03-28 → 2019-03-29
    Icebergs reported in: a. B09F, 58-31S 051-30W
  3. HYDROLANT 971/19 · Icebergs2019-03-27 → 2019-03-28
    Icebergs reported in: a. B15T, 54-29S 027-10W
  4. HYDROLANT 968/19 · Icebergs2019-03-27 → 2019-03-28
    Icebergs reported in: a. B09F, 59-31S 051-30W
  5. HYDROLANT 958/19 · Icebergs2019-03-27 → 2019-03-28
    Icebergs reported in: a. B15T, 54-25S 027-17W
  6. HYDROLANT 954/19 · Icebergs2019-03-26 → 2019-03-27
    Icebergs reported in: a. B09F, 59-31S 051-30W
  7. HYDROLANT 947/19 · Icebergs2019-03-26 → 2019-03-27
    Icebergs reported in: a. B15T, 54-25S 027-17W
  8. HYDROLANT 946/19 · Icebergs2019-03-25 → 2019-03-26
    Icebergs reported in: a. B09F, 59-29S 051-59W
  9. HYDROLANT 847/19 · Icebergs2019-03-16 → 2019-03-17
    Icebergs reported in: a. B09F, 59-29S 051-59W
  10. HYDROLANT 837/19 · Icebergs2019-03-15 → 2019-03-16
    Icebergs reported in: a. B09F, 59-29S 051-59W
  11. HYDROLANT 821/19 · Icebergs2019-03-14 → 2019-03-15
    Icebergs reported in: a. B09F, 59-29S 051-59W
  12. HYDROLANT 801/19 · Icebergs2019-03-13 → 2019-03-14
    Icebergs reported in: a. B09F, 59-29S 051-59W
  13. HYDROLANT 765/19 · Icebergs2019-03-10 → 2019-03-11
    Icebergs reported in: a. B09F, 59-29S 051-59W
  14. HYDROLANT 754/19 · Icebergs2019-03-09 → 2019-03-10
    Icebergs reported in: a. B09F, 59-29S 051-59W
  15. HYDROLANT 742/19 · Icebergs2019-03-08 → 2019-03-09
    Icebergs reported in: a. B09F, 59-29S 051-59W
  16. HYDROLANT 734/19 · Icebergs2019-03-07 → 2019-03-08
    Icebergs reported in: a. B09F, 59-29S 051-59W
  17. HYDROLANT 721/19 · Icebergs2019-03-06 → 2019-03-07
    Icebergs reported in: a. B09F, 59-29S 051-59W
  18. HYDROLANT 707/19 · Icebergs2019-03-05 → 2019-03-06
    Icebergs reported in: a. B09F, 59-29S 051-59W
  19. HYDROLANT 693/19 · Icebergs2019-03-04 → 2019-03-05
    Icebergs reported in: a. B09F, 59-29S 051-59W
  20. HYDROLANT 688/19 · Icebergs2019-03-03 → 2019-03-04
    Icebergs reported in: a. B09F, 59-29S 051-59W

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