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 2565/23 · Icebergs2023-11-09 → 2023-11-10Icebergs reported in: a. A23A, 63-20.40S 051-40.80W
- HYDROLANT 2557/23 · Wrecks2023-11-08 → 2023-11-26Significantly less water than charted reported in 61-40.26S 060-44.82W
- HYDROLANT 2556/23 · Icebergs2023-11-08 → 2023-11-09Icebergs reported in: a. A23A, 63-20.40S 051-40.80W
- HYDROLANT 2548/23 · Icebergs2023-11-07 → 2023-11-08Icebergs reported in: a. A23A, 63-20.40S 051-40.80W
- HYDROLANT 2535/23 · Icebergs2023-11-06 → 2023-11-07Icebergs reported in: a. A23A, 63-20.40S 051-40.80W
- HYDROLANT 2530/23 · Icebergs2023-11-05 → 2023-11-06Iceberg reported in: a. A23A, 63-20.40S 051-40.80W
- HYDROLANT 2525/23 · Icebergs2023-11-04 → 2023-11-05Iceberg reported in: a. A23A, 63-34.80S 051-48.60W
- HYDROLANT 2514/23 · Icebergs2023-11-03 → 2023-11-04Icebergs reported in: a. A23A, 63-34.80S 051-48.60W
- USGS-US7000L8JC · Quakes2023-11-03 → 2023-11-06Earthquake magnitude 5.7 (mww) in 62.295S 155.543W, depth 10 km at 030752Z nov 23
- HYDROLANT 2503/23 · Icebergs2023-11-02 → 2023-11-03Icebergs reported in: a. D30A, 57-31.80S 047-14.40W
- HYDROLANT 2492/23 · Icebergs2023-11-01 → 2023-11-02Icebergs reported in: a. D30A, 57-31.80S 047-14.40W
- HYDROLANT 2481/23 · Icebergs2023-10-31 → 2023-11-01Icebergs reported in: a. D30A, 57-31.80S 047-14.40W
- HYDROLANT 2474/23 · Icebergs2023-10-30 → 2023-10-31Icebergs reported in: a. D30A, 57-31.80S 047-14.40W
- HYDROLANT 2458/23 · Icebergs2023-10-27 → 2023-10-28Icebergs reported in: a. A23A, 63-46.80S 052-18.00W
- USGS-US7000L6LR · Quakes2023-10-26 → 2023-10-29Earthquake magnitude 5.6 (mww) in 61.127S 160.763E, depth 10 km at 261920Z oct 23
- HYDROLANT 2447/23 · Icebergs2023-10-26 → 2023-10-27Icebergs reported in: a. A23A, 63-46.80S 052-18.00W
- HYDROLANT 2437/23 · Icebergs2023-10-25 → 2023-10-26Icebergs reported in: a. A23A, 64-00.00S 052-45.00W
- HYDROLANT 2427/23 · Icebergs2023-10-24 → 2023-10-25Icebergs reported in: a. A23A, 64-00.00S 052-45.00W
- HYDROLANT 2420/23 · Icebergs2023-10-23 → 2023-10-24Icebergs reported in: a. A23A, 64-00.00S 052-45.00W
- HYDROLANT 2411/23 · Icebergs2023-10-22 → 2023-10-23Icebergs reported in: a. A23A, 64-00.00S 052-45.00W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.