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 3025/22 · Icebergs2022-11-24 → 2022-11-25Icebergs reported in: a. A76A 59-12.00S 048-37.00W
- HYDROLANT 3024/22 · Icebergs2022-11-24 → 2022-11-25Icebergs reported in: a. A64, 61-46.80S 052-09.00W
- HYDROLANT 3009/22 · Icebergs2022-11-23 → 2022-11-24Icebergs reported in: a. A64, 61-46.80S 052-09.00W
- HYDROLANT 3008/22 · Icebergs2022-11-23 → 2022-11-24Icebergs reported in: a. A76A, 58-56.00S 048-36.00W
- HYDROPAC 3340/22 · Missiles2022-11-23 → 2022-11-29Hazardous operations, space debris 1500Z to 1700Z daily 27 thru 30 nov in area bound by 59-42.60S…
- HYDROLANT 2998/22 · Icebergs2022-11-22 → 2022-11-23Icebergs reported in: a. A64, 61-46.80S 052-09.00W
- HYDROLANT 2997/22 · Icebergs2022-11-22 → 2022-11-23Icebergs reported in: a. A76A, 59-23.00S 048-51.00W
- HYDROLANT 2989/22 · Icebergs2022-11-21 → 2022-11-22Icebergs reported in: a. A76A, 59-20.00S 049-00.00W
- HYDROLANT 2982/22 · Icebergs2022-11-20 → 2022-11-21Icebergs reported in: a. A64, 62-25.80S 053-27.60W
- HYDROLANT 2981/22 · Icebergs2022-11-20 → 2022-11-21Icebergs reported in: a. A76A, 59-20.00S 049-00.00W
- HYDROLANT 2972/22 · Icebergs2022-11-19 → 2022-11-20Icebergs reported in: a. A64, 62-25.80S 053-27.60W
- HYDROLANT 2971/22 · Icebergs2022-11-19 → 2022-11-20Icebergs reported in: a. A76A, 59-20.00S 049-05.00W
- HYDROLANT 2961/22 · Icebergs2022-11-18 → 2022-11-19Icebergs reported in: a. A76A, 59-16.00S 049-05.00W
- HYDROLANT 2954/22 · Icebergs2022-11-17 → 2022-11-18Icebergs reported in: a. A64, 62-25.80S 053-27.60W
- HYDROLANT 2953/22 · Icebergs2022-11-17 → 2022-11-18Icebergs reported in: a. A76A, 59-18.00S 049-09.00W
- HYDROLANT 2939/22 · Icebergs2022-11-16 → 2022-11-17Icebergs reported in: a. A64, 62-25.80S 053-27.60W
- HYDROLANT 2938/22 · Icebergs2022-11-16 → 2022-11-17Icebergs reported in: a. A76A, 59-13.00S 049-08.00W
- HYDROLANT 2927/22 · Icebergs2022-11-15 → 2022-11-16Icebergs reported in: a. A64, 62-25.80S 053-27.60W
- HYDROLANT 2926/22 · Icebergs2022-11-15 → 2022-11-16Icebergs reported in: a. A76A, 59-13.00S 049-11.00W
- USGS-US7000IPM8 · Quakes2022-11-14 → 2022-11-17Earthquake magnitude 5.6 (mwb) in 64.007S 167.855W, depth 10 km at 141501Z nov 22
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.