Southern Ocean
IHO sea area 67 · -180° to 180° E, -86° to -60° N
- in force
- 2
- last 12 months
- 40
- archive messages
- 3,461
- categories
- 13
What the archive shows
3,461 messages are recorded since 1989-01-28 for the Southern Ocean. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Icebergs accounts for 3,013 of 3,461 recorded messages (87%), the largest category group in this selection.
The NGA historical archive froze in 2024-05; live collection began 2026-08-17. Counts around that gap are incomplete, and changes in reporting volume do not establish changes in incident frequency.
- An older warning still listed in force · issued 2026-06-30 13:27ZIcebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
In force now · 2
- HYDROLANT 1959/26 · Icebergs2026-10-02Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at A84, A85, D33A and D33C; the warning cancels 03 October 2026 0413.
- HYDROLANT 1279/26 · Icebergs2026-06-30Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
Longest in force
- HYDROLANT 1279/26 · Icebergs2026-06-30Icebergs are reported in South Atlantic, South Pacific, and Antarctica at positions A81, A84, A85, D33A, D33C; cancel message 011327Z July 26.
- HYDROLANT 1959/26 · Icebergs2026-10-02Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at A84, A85, D33A and D33C; the warning cancels 03 October 2026 0413.
By year
89
97
98
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
25
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
By category · available archive
| Icebergs | 3,013 | 87% |
| Quakes | 242 | 7% |
| Incidents | 68 | 2% |
| Surveys | 42 | 1% |
| Missiles | 39 | 1% |
| Nav aids | 24 | 1% |
| Wrecks | 12 | 0% |
| Other | 10 | 0% |
| Derelicts | 4 | 0% |
| Spills | 3 | 0% |
| Exercises | 2 | 0% |
| Debris | 1 | 0% |
| Containers | 1 | 0% |
Archive · 3,459 cancelled
- HYDROLANT 501/23 · Icebergs2023-03-05 → 2023-03-06Icebergs reported in: a. A23A, 71-55.20S 048-46.80W
- HYDROLANT 500/23 · Icebergs2023-03-05 → 2023-03-06Icebergs reported in: a. A76A, 55-28.00S 047-09.00W
- HYDROLANT 496/23 · Icebergs2023-03-04 → 2023-03-05Icebergs reported in: a. A76A, 55-31.00S 047-10.00W
- HYDROLANT 495/23 · Icebergs2023-03-04 → 2023-03-05Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 490/23 · Icebergs2023-03-03 → 2023-03-04Icebergs reported in: a. A76A, 55-34.00S 047-14.00W
- HYDROLANT 489/23 · Icebergs2023-03-03 → 2023-03-04Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 479/23 · Icebergs2023-03-02 → 2023-03-03Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 473/23 · Icebergs2023-03-01 → 2023-03-02Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 463/23 · Icebergs2023-02-28 → 2023-03-01Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 456/23 · Icebergs2023-02-27 → 2023-02-28Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 445/23 · Icebergs2023-02-26 → 2023-02-27Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 438/23 · Icebergs2023-02-25 → 2023-02-26Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 428/23 · Icebergs2023-02-24 → 2023-02-25Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 418/23 · Icebergs2023-02-23 → 2023-02-24Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 412/23 · Icebergs2023-02-22 → 2023-02-23Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 404/23 · Icebergs2023-02-21 → 2023-02-22Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 395/23 · Icebergs2023-02-20 → 2023-02-21Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 388/23 · Icebergs2023-02-19 → 2023-02-19Icebergs reported in: a. A23A, 72-00.00S 048-03.60W
- HYDROLANT 384/23 · Icebergs2023-02-18 → 2023-02-19Icebergs reported in: a. A70, 65-13.20S 060-30.60W
- HYDROLANT 377/23 · Icebergs2023-02-17 → 2023-02-18Icebergs reported in: a. A70, 65-13.20S 060-30.60W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.