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 · 3,455 cancelled
- HYDROLANT 1312/23 · Icebergs2023-06-13 → 2023-06-14Icebergs reported in: a. A23A, 70-12.00S 055-34.20W
- HYDROLANT 1311/23 · Icebergs2023-06-13 → 2023-06-16Iceberg reported in vicinity 62-20.10S 054-59.20W
- HYDROLANT 1304/23 · Icebergs2023-06-12 → 2023-06-13Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1295/23 · Icebergs2023-06-11 → 2023-06-12Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1289/23 · Icebergs2023-06-10 → 2023-06-11Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- USGS-US7000K7IZ · Quakes2023-06-09 → 2023-06-12Earthquake magnitude 5.9 (mww) in 60.507S 160.297E, depth 10 km at 092121Z jun 23
- HYDROLANT 1283/23 · Icebergs2023-06-09 → 2023-06-10Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1273/23 · Icebergs2023-06-08 → 2023-06-09Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1260/23 · Icebergs2023-06-07 → 2023-06-08Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1254/23 · Icebergs2023-06-06 → 2023-06-07Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1247/23 · Icebergs2023-06-05 → 2023-06-06Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- USGS-US7000K6BX · Quakes2023-06-05 → 2023-06-08Earthquake magnitude 5.8 (mww) in 62.276S 155.430E, depth 10 km at 050245Z jun 23
- HYDROLANT 1242/23 · Icebergs2023-06-04 → 2023-06-05Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1240/23 · Icebergs2023-06-03 → 2023-06-04Icebergs reported in: a. A23A, 70-45.60S 054-30.00W
- HYDROLANT 1232/23 · Icebergs2023-06-02 → 2023-06-03Icebergs reported in: a. A23A, 71-01.20S 054-07.80W
- HYDROLANT 1221/23 · Icebergs2023-06-01 → 2023-06-02Icebergs reported in: a. A23A, 71-01.20S 054-07.80W
- HYDROLANT 1212/23 · Icebergs2023-05-31 → 2023-06-01Icebergs reported in: a. A23A, 71-01.20S 054-07.80W
- HYDROLANT 1203/23 · Icebergs2023-05-30 → 2023-05-31Icebergs reported in: a. A23A, 71-01.20S 054-07.80W
- HYDROLANT 1199/23 · Icebergs2023-05-30 → 2023-06-02Iceberg reported in vicinity 62-11.50S 054-09.10W
- HYDROLANT 1195/23 · Icebergs2023-05-29 → 2023-05-30Icebergs reported in: a. A23A, 71-01.20S 054-07.80W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.