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 1949/26 · Icebergs2026-10-01 → 2026-10-01Icebergs reported in: a. A84, 70-24.60S 097-40.80W
- HYDROLANT 1934/26 · Icebergs2026-09-30 → 2026-09-30Icebergs reported in: a. A84, 70-24.60S 097-40.80W
- HYDROLANT 1928/26 · Icebergs2026-09-29 → 2026-09-29Icebergs are reported in the Scotia Sea, South Atlantic, South Pacific, and Antarctica at coordinates including A84 70-24.60S 097-40.80W; cancel this message 300352Z September 26.
- HYDROLANT 1922/26 · Icebergs2026-09-28 → 2026-09-28Icebergs are reported in the Scotia Sea, South Atlantic, South Pacific and Antarctica at four positions; the notice cancels on 29 September 2026.
- HYDROLANT 1894/26 · Icebergs2026-09-25 → 2026-10-02Icebergs were reported in the Scotia Sea, South Atlantic, South Pacific and Antarctica at four locations, with this message cancelled on 26 September.
- HYDROLANT 1886/26 · Icebergs2026-09-24 → 2026-09-24Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at four positions, with cancellation on 25 September 2026 at 0420 UTC.
- HYDROLANT 1881/26 · Icebergs2026-09-23 → 2026-09-23Icebergs are reported in Scotia Sea, South Atlantic, South Pacific and Antarctica; warning cancels 24 September 2026 at 0414 UTC.
- HYDROLANT 1845/26 · Icebergs2026-09-17 → 2026-09-17Icebergs are reported in the Scotia Sea, South Atlantic, South Pacific and Antarctica at four positions including 71-11.40S 101-39.00W; the message cancels 18 September 2026.
- HYDROPAC 2681/26 · Missiles2026-09-16 → 2026-09-17Space debris makes hazardous operations in the South Pacific from 0800Z to 2100Z daily, 17 through 21 September.
- HYDROLANT 1836/26 · Icebergs2026-09-16 → 2026-09-16Icebergs are reported in the Scotia Sea, South Atlantic, South Pacific, and Antarctica at listed positions; this warning cancels at 0358 on 17 September 2026.
- HYDROLANT 1817/26 · Icebergs2026-09-14 → 2026-09-14Icebergs are reported at four positions in the Scotia Sea, South Atlantic, South Pacific and Antarctica, with this warning cancelled 15 September at 0350 Zulu.
- HYDROLANT 1799/26 · Icebergs2026-09-11 → 2026-09-10Icebergs are reported in Scotia Sea, South Atlantic, South Pacific, and Antarctica at positions A84, A85, D33A, D33C; notice cancels 12 September 2026 at 0430 UTC.
- HYDROLANT 1791/26 · Icebergs2026-09-10 → 2026-09-10Icebergs A84, A85, D33A, and D33C are reported in the Scotia Sea, South Atlantic, South Pacific, and Antarctica; cancel this message 11 September 2026 at 0423.
- HYDROLANT 1789/26 · Icebergs2026-09-09 → 2026-09-09Icebergs are reported at four positions in the Scotia Sea, South Atlantic, South Pacific and Antarctica; this warning cancels 10 September 2026.
- HYDROLANT 1782/26 · Icebergs2026-09-08 → 2026-09-08Icebergs reported at multiple positions in Scotia Sea, South Atlantic, South Pacific, Antarctica; cancel message on Sep 26.
- HYDROLANT 1740/26 · Icebergs2026-09-03 → 2026-09-03Icebergs reported in the Scotia Sea and Antarctica at positions A84, A85, D33A, and D33C. Cancel September 4, 2026.
- HYDROLANT 1727/26 · Icebergs2026-09-01 → 2026-09-01Icebergs reported in Scotia Sea, South Atlantic, South Pacific, Antarctica at positions A84, A85, D33A, D33C.
- HYDROLANT 1716/26 · Icebergs2026-08-31 → 2026-08-31Icebergs reported in: a. A84, 71-34.80S 101-43.80W
- HYDROLANT 1688/26 · Icebergs2026-08-28 → 2026-08-28Icebergs A84, A85, D33A, D33C reported in Scotia Sea, South Atlantic, South Pacific, Antarctica. This warning cancels August 29, 2026.
- HYDROLANT 1657/26 · Icebergs2026-08-24 → 2026-08-24Icebergs reported in Scotia Sea, South Atlantic, South Pacific, Antarctica at several positions; message cancels at 250518Z August 26.
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.