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 · 3,457 cancelled
- HYDROLANT 1042/23 · Icebergs2023-05-11 → 2023-05-12Icebergs reported in: a. A23A, 71-21.00S 052-46.20W
- HYDROLANT 1030/23 · Icebergs2023-05-10 → 2023-05-11Icebergs reported in: a. A23A, 71-21.00S 052-46.20W
- HYDROLANT 1018/23 · Icebergs2023-05-09 → 2023-05-10Icebergs reported in: a. A23A, 71-21.00S 052-46.20W
- HYDROLANT 1004/23 · Icebergs2023-05-08 → 2023-05-09Icebergs reported in: a. A23A, 71-21.00S 052-46.20W
- HYDROLANT 990/23 · Icebergs2023-05-07 → 2023-05-08Icebergs reported in: a. A23A, 71-21.00S 052-46.20W
- HYDROLANT 985/23 · Icebergs2023-05-06 → 2023-05-07Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 976/23 · Icebergs2023-05-05 → 2023-05-06Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 966/23 · Icebergs2023-05-04 → 2023-05-05Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 951/23 · Icebergs2023-05-03 → 2023-05-04Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 939/23 · Icebergs2023-05-02 → 2023-05-03Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 935/23 · Icebergs2023-05-01 → 2023-05-02Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 929/23 · Icebergs2023-04-30 → 2023-05-01Icebergs reported in: a. A23A, 71-32.40S 052-01.20W
- HYDROLANT 922/23 · Icebergs2023-04-29 → 2023-04-30Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- HYDROLANT 909/23 · Icebergs2023-04-28 → 2023-04-29Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- HYDROLANT 901/23 · Icebergs2023-04-27 → 2023-04-28Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- HYDROLANT 896/23 · Icebergs2023-04-26 → 2023-04-27Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- HYDROLANT 887/23 · Icebergs2023-04-25 → 2023-04-26Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- HYDROLANT 883/23 · Icebergs2023-04-24 → 2023-04-25Icebergs reported in: a. A23A, 71-40.80S 051-54.00W
- USGS-US6000K6NS · Quakes2023-04-24 → 2023-04-27Earthquake magnitude 5.6 (mb) in 60.461S 026.230W, depth 10 km at 240217Z apr 23
- HYDROLANT 874/23 · Icebergs2023-04-23 → 2023-04-24Icebergs reported in: a. A23A, 71-45.60S 051-19.20W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.