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 2524/22 · Missiles2022-10-05 → 2022-10-11Hazardous operations, space debris 0300Z to 0500Z daily 10 and 11 oct in area bound by 59-42.60S 165-49.20E,…
- HYDROPAC 2786/22 · Missiles2022-10-05 → 2022-10-11Hazardous operations, space debris 0300Z to 0500Z daily 10 and 11 oct in area bound by 59-42.60S 165-49.20E,…
- HYDROLANT 2516/22 · Icebergs2022-10-04 → 2022-10-05Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2506/22 · Icebergs2022-10-03 → 2022-10-04Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2505/22 · Icebergs2022-10-03 → 2022-10-04Icebergs reported in: a. A76A, 60-22.00S 051-13.00W
- HYDROLANT 2502/22 · Icebergs2022-10-02 → 2022-10-03Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2495/22 · Icebergs2022-10-01 → 2022-10-02Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2488/22 · Icebergs2022-09-30 → 2022-10-01Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2474/22 · Icebergs2022-09-29 → 2022-09-30Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2469/22 · Icebergs2022-09-29 → 2022-10-02Iceberg reported in vicinity 61-00.00S 053-00.00W
- USGS-US6000IP57 · Quakes2022-09-29 → 2022-10-02Earthquake magnitude 6.5 (mww) in 60.831S 020.025W, depth 11 km at 290303Z sep 22
- HYDROLANT 2463/22 · Icebergs2022-09-28 → 2022-09-29Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2456/22 · Icebergs2022-09-27 → 2022-09-28Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2438/22 · Icebergs2022-09-26 → 2022-09-27Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2427/22 · Icebergs2022-09-25 → 2022-09-26Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2418/22 · Icebergs2022-09-24 → 2022-09-25Icebergs reported in: a. A64, 64-42.00S 055-48.00W
- HYDROLANT 2407/22 · Icebergs2022-09-23 → 2022-09-24Icebergs reported in: a. A64, 64-51.00S 056-35.40W
- HYDROLANT 2399/22 · Icebergs2022-09-22 → 2022-09-23Icebergs reported in: a. A64, 64-51.00S 056-35.40W
- HYDROLANT 2397/22 · Icebergs2022-09-22 → 2022-09-25Iceberg reported in vicinity 61-20.40S 053-10.70W
- HYDROLANT 2395/22 · Icebergs2022-09-21 → 2022-09-22Icebergs reported in: a. A64, 64-51.00S 056-35.40W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.