Arctic Ocean
IHO sea area 17 · -180° to 180° E, 71° to 90° N
- in force
- 1
- last 12 months
- 1
- archive messages
- 260
- categories
- 13
What the archive shows
260 messages are recorded since 1991-09-16 for the Arctic 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.
Missiles accounts for 101 of 260 recorded messages (39%), 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 2024-12-17 08:58ZFour scientific moorings established in Beaufort and Chukchi Seas off Alaska at various positions and depths.
In force now · 1
Longest in force
By year
91
97
99
02
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
| Missiles | 101 | 39% |
| Surveys | 81 | 31% |
| Quakes | 27 | 10% |
| Exercises | 18 | 7% |
| Cable ops | 13 | 5% |
| Other | 6 | 2% |
| Icebergs | 3 | 1% |
| Nav aids | 3 | 1% |
| Restricted | 2 | 1% |
| Wrecks | 2 | 1% |
| Towing | 2 | 1% |
| Debris | 1 | 0% |
| Spills | 1 | 0% |
Archive · 259 cancelled
- HYDROARC 35/06 · Surveys2006-10-21 → 2011-07-02Bottom scientific mooring established 81-33.761N 030-55.390E
- HYDROARC 34/06 · Surveys2006-10-21 → 2011-07-02Bottom scientific mooring established 80-57.746N 105-00.225E
- HYDROARC 33/06 · Surveys2006-10-21 → 2011-07-02Bottom scientific mooring established 79-55.717N 142-21.812E
- HYDROARC 32/06 · Surveys2006-10-21 → 2011-07-02Bottom scientific mooring established 78-30N 142-00E
- HYDROARC 30/06 · Surveys2006-10-21 → 2011-07-02Bottom scientific mooring established 78-27.994N 125-40.909E
- HYDROARC 6/06 · Surveys2006-10-21 → 2011-05-21Bottom scientific mooring, top float 50 meters established in 76-59.457N 139-58.407W
- HYDROARC 5/06 · Surveys2006-10-21 → 2011-05-21Scientific mooring established in 78-00.967N 149-51.544W
- HYDROARC 4/06 · Surveys2006-10-21 → 2011-05-21Scientific mooring established in 75-00.242N 149-57.742W
- HYDROPAC 1572/06 · Other2006-08-18 → 2006-08-24Unusually large ice floes reported within 115 miles of 77-42.7N 178-19.3E on 17 aug
- NAVAREA XII 202/06 · Icebergs2006-08-16 → 2006-08-23Iceberg sighted in 72-06N 161-30W on 16 aug
- HYDROARC 5/05 · Surveys2005-08-15 → 2005-09-28Underwater operations by uscgc healy in: a. 78-27.000N 162-42.000W on 16 aug
- USGS-USP000DWST · Quakes2005-08-06 → 2005-08-09Earthquake magnitude 5.5 (mwc) in 85.263N 097.163E, depth 10 km at 060402Z aug 05
- HYDROARC 3/05 · Surveys2005-07-18 → 2011-05-21Scientific mooring established in 89-15.173N 064-41.509E
- USGS-USP000DHWN · Quakes2005-03-10 → 2005-03-13Earthquake magnitude 5.5 (mwc) in 85.247N 092.895E, depth 10 km at 100028Z mar 05
- USGS-USP000DHN1 · Quakes2005-03-06 → 2005-03-09Earthquake magnitude 6.3 (mwc) in 84.948N 099.391E, depth 10 km at 060521Z mar 05
- HYDROARC 9/04 · Debris2004-12-21 → 2010-07-04Scientific mooring adrift vicinity 89-07.7N 035-45.9E at 091400Z dec
- HYDROPAC 1946/04 · Exercises2004-12-21 → 2004-12-26Hazardous operations 1100Z to 1300Z and 1700Z to 1900Z daily 24 thru 26 dec in area bound by 75-25N 174-00E,…
- HYDROARC 8/04 · Exercises2004-12-13 → 2004-12-27Hazardous operations 1126Z to 1656Z daily 17 thru 27 dec in area bound by 88-23N 148-30W, 89-05N 148-00W,…
- HYDROLANT 1989/04 · Exercises2004-12-13 → 2004-12-18Hazardous operations 1126Z to 1656Z daily 17 thru 27 dec in areas bound by: a. 05-28N 053-03W, 05-09N…
- HYDROARC 7/04 · Surveys2004-10-18 → 2011-05-21Scientific moorings established in 89-27.29N 054-19.74E
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.