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 2169/23 · Icebergs2023-09-26 → 2023-09-27Icebergs reported in: a. A23A, 64-38.40S 053-57.60W
- HYDROLANT 2157/23 · Icebergs2023-09-25 → 2023-09-26Icebergs reported in: a. A23A, 64-38.40S 053-57.60W
- HYDROLANT 2151/23 · Icebergs2023-09-24 → 2023-09-25Iceberg reported in: a. A23A, 64-38.40S 053-57.60W
- HYDROLANT 2145/23 · Icebergs2023-09-23 → 2023-09-24Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2136/23 · Icebergs2023-09-22 → 2023-09-23Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2127/23 · Icebergs2023-09-21 → 2023-09-22Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2120/23 · Icebergs2023-09-21 → 2023-09-24Iceberg reported in 60-25.40S 054-04.10W
- HYDROLANT 2114/23 · Icebergs2023-09-20 → 2023-09-21Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2104/23 · Icebergs2023-09-19 → 2023-09-20Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2095/23 · Icebergs2023-09-18 → 2023-09-19Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2090/23 · Icebergs2023-09-17 → 2023-09-18Iceberg reported in: a. A23A, 65-04.80S 053-42.00W
- HYDROLANT 2081/23 · Icebergs2023-09-16 → 2023-09-17Iceberg reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2072/23 · Icebergs2023-09-15 → 2023-09-16Iceberg reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2063/23 · Icebergs2023-09-14 → 2023-09-15Iceberg reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2058/23 · Icebergs2023-09-13 → 2023-09-14Icebergs reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2051/23 · Icebergs2023-09-12 → 2023-09-13Icebergs reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2042/23 · Icebergs2023-09-11 → 2023-09-12Icebergs reported in: a. A23A, 65-27.60S 053-37.80W
- HYDROLANT 2035/23 · Icebergs2023-09-10 → 2023-09-11Iceberg reported in: a. A23A, 65-43.20S 053-28.80W
- HYDROLANT 2032/23 · Icebergs2023-09-09 → 2023-09-10Iceberg reported in: a. A23A, 65-43.20S 053-28.80W
- HYDROLANT 2031/23 · Icebergs2023-09-09 → 2023-09-10Iceberg reported in 61-15.80S 053-59.50W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.