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% |
| Spills | 1 | 0% |
| Debris | 1 | 0% |
Archive · 259 cancelled
- HYDROARC 50/11 · Missiles2011-04-21 → 2011-04-27Hazardous operations 261200Z to 261900Z and 271000Z to 271700Z apr in areas: a. between 69-27N 69-33N and…
- HYDROARC 49/11 · Missiles2011-04-20 → 2011-04-25Hazardous operations 1200Z to 1900Z daily 24 and 25 apr in areas bound by: a. 70-40.0N 034-13.0E, 71-36.0N…
- HYDROARC 44/11 · Missiles2011-04-12 → 2011-04-16Hazardous operations 0400Z to 1000Z daily 15 and 16 apr in areas: a. between 69-27.0N 69-33.0N and 034-10.0E…
- HYDROARC 41/11 · Missiles2011-04-08 → 2011-04-14Hazardous operations 0100Z to 0700Z daily 12 thru 14 apr in areas: a. between 69-27.0N 69-33.0N and…
- HYDROARC 34/11 · Missiles2011-03-25 → 2011-03-30Hazardous operations 291000Z to 291700Z, 1500Z to 2200Z daily 30 and 31 mar in areas: a. between 69-27.0N…
- HYDROARC 24/11 · Missiles2011-02-15 → 2011-02-21Hazardous operations 181800Z to 182359Z, 200300Z to 201000Z and 210200Z to 210800Z feb in areas bound by: a.…
- HYDROARC 131/10 · Missiles2010-12-21 → 2010-12-26Hazardous operations 240200Z to 240800Z, 250100Z to 250700Z and 261100Z to 261600Z dec in areas bound by: a.…
- HYDROARC 123/10 · Missiles2010-11-25 → 2010-12-13Hazardous operations 0200Z to 1200Z daily 27 nov thru 13 dec: a. within two miles of 69-18N 016-01E
- HYDROARC 105/10 · Missiles2010-10-25 → 2010-10-28Hazardous operations 280500Z to 281400Z in areas bound by: a. 69-27.0N 034-10.0E, 69-33.0N 034-10.0E,…
- HYDROARC 103/10 · Surveys2010-10-25 → 2017-04-07Chuchki Sea
- HYDROARC 86/10 · Surveys2010-09-23 → 2011-10-31Nga chart 16003 (17TH ed)
- HYDROARC 77/10 · Surveys2010-09-12 → 2011-10-08Nga chart 16005 (10TH ed)
- HYDROARC 49/10 · Missiles2010-08-06 → 2010-08-09Hazardous operations in progress until 061700Z, 062300Z to 070500Z and 082000Z to 090200Z aug in areas bound…
- HYDROARC 35/10 · Surveys2010-07-09 → 2012-12-16Scientific mooring established in 89-26.4N 145-06.6W
- HYDROARC 24/10 · Surveys2010-07-04 → 2012-12-16Scientific mooring established in 85-58.80N 162-11.40W
- HYDROARC 23/10 · Other2010-07-04 → 2011-07-02Underwater seamount, least depth 925 meters, reported in 78-36.91N 158-21.35W
- HYDROARC 20/10 · Surveys2010-07-03 → 2012-12-16Scientific mooring, top float 40 meters, established in 86-27.24N 046-24.72W
- HYDROARC 17/10 · Surveys2010-07-03 → 2010-08-15Scientific mooring, top float 50 meters, established in 77-59.58N 149-57.87W
- HYDROARC 10/10 · Surveys2010-07-02 → 2012-12-16Nga chart 803 (1ST ed)
- HYDROARC 9/10 · Surveys2010-07-02 → 2011-08-14Nga chart 801 (1ST ed)
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.