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 510/99 · Icebergs1999-06-09 → 1999-06-16
    Large icebergs reported on 04 jun vicinity: a. 61-15S 058-59W
  2. HYDROLANT 1195/99 · Icebergs1999-06-09 → 1999-06-16
    Large icebergs reported on 04 jun vicinity: a. 61-15S 058-59W
  3. HYDROPAC 496/99 · Icebergs1999-06-02 → 1999-06-09
    Large icebergs reported on 01 jun vicinity: a. 61-23S 061-28W
  4. HYDROLANT 1136/99 · Icebergs1999-06-02 → 1999-06-09
    Large icebergs reported on 01 jun vicinity: a. 61-23S 061-28W
  5. HYDROPAC 468/99 · Icebergs1999-05-27 → 1999-06-02
    Large icebergs reported on 24 may vicinity: a. 61-23S 061-28W
  6. HYDROLANT 1087/99 · Icebergs1999-05-27 → 1999-06-02
    Large icebergs reported on 24 may vicinity: a. 61-23S 061-28W
  7. HYDROLANT 1020/99 · Icebergs1999-05-19 → 1999-05-26
    Large icebergs reported on 18 may vicinity: a. 61-23S 061-28W
  8. HYDROPAC 433/99 · Icebergs1999-05-19 → 1999-05-26
    Large icebergs reported on 18 may vicinity: a. 61-23S 061-28W
  9. HYDROLANT 841/99 · Icebergs1999-04-27 → 1999-05-11
    Large icebergs reported on 26 apr as follows: a. 61-23S 061-28W
  10. HYDROLANT 826/99 · Icebergs1999-04-26 → 1999-04-27
    Large icebergs reported on 16 apr as follows: a. 63-01S 066-17W

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