Japan Sea
IHO sea area 52 · 126° to 142° E, 33° to 52° N
- in force
- 0
- last 12 months
- 16
- archive messages
- 1,301
- categories
- 15
What the archive shows
1,301 messages are recorded since 1993-06-02 for the Japan Sea. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Exercises accounts for 635 of 1,301 recorded messages (49%), 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.
In force now · 0
Nothing in force in this sea right now.
By year
93
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
| Exercises | 635 | 49% |
| Missiles | 190 | 15% |
| Other | 105 | 8% |
| Incidents | 103 | 8% |
| Quakes | 87 | 7% |
| Derelicts | 51 | 4% |
| Surveys | 34 | 3% |
| Ordnance | 29 | 2% |
| Cable ops | 24 | 2% |
| Nav aids | 17 | 1% |
| Restricted | 15 | 1% |
| Wrecks | 5 | 0% |
| Debris | 3 | 0% |
| Containers | 2 | 0% |
| Volcanic | 1 | 0% |
Archive · 1,301 cancelled
- HYDROPAC 3537/20 · Missiles2020-11-30 → 2020-12-07Missile operations 2100Z to 0900Z daily 02 thru 06 dec in area bound by 42-28.2N 132-01.4E, 42-28.2N…
- HYDROPAC 3515/20 · Exercises2020-11-28 → 2020-12-01Gunnery exercises 2200Z to 0800Z daily 29 and 30 nov in area bound by 42-40.0N 131-41.0E, 42-40.0N…
- HYDROPAC 3476/20 · Missiles2020-11-24 → 2020-12-02Missile operations 2100Z to 0900Z daily 26 nov thru 01 dec in area bound by 42-28.2N 132-01.4E, 42-28.2N…
- HYDROPAC 3439/20 · Exercises2020-11-22 → 2020-11-29Gunnery exercises 2100Z to 0900Z daily 24 thru 28 nov in area bound by 42-56-42N 131-31-36E, 43-04-00N…
- HYDROPAC 3438/20 · Exercises2020-11-22 → 2020-11-24Gunnery exercises in progress 2100Z to 0900Z daily until 23 nov in area bound by 42-56-42N 131-31-36E,…
- HYDROPAC 3402/20 · Missiles2020-11-20 → 2020-11-29Missile operations 2100Z to 0900Z daily 24 thru 28 nov in area bound by 42-40.0N 131-41.0E, 42-40.0N…
- HYDROPAC 3392/20 · Incidents2020-11-19 → 2020-12-04Distress signal received on 406 mhz in 40-33-12N 131-59-12E at 190911Z nov
- HYDROPAC 3366/20 · Missiles2020-11-16 → 2020-11-24Missile operations 2100Z to 0900Z daily 19 thru 23 nov in area bound by 42-40.0N 131-41.0E, 42-40.0N…
- HYDROPAC 3319/20 · Exercises2020-11-10 → 2020-11-18Gunnery exercises 2200Z to 1000Z daily 12 thru 17 nov in area bound by 42-15.0N 131-41.0E 42-40.0N 131-41.0E…
- HYDROPAC 3232/20 · Surveys2020-11-03 → 2020-11-12Survey operations 082100Z to 122100Z nov by M/V deepwater dive in area bound by 42-57.0N 134-14.0E, 43-04.0N…
- HYDROPAC 3211/20 · Exercises2020-11-02 → 2020-11-12Gunnery exercises 2200Z to 1000Z commencing daily 02 thru 11 nov in area bound by 42-15.0N 131-41.0E,…
- HYDROPAC 3185/20 · Missiles2020-10-29 → 2020-11-06Missile operations 0001Z to 1400Z daily 03 thru 06 nov in area bound by 42-00N 132-20E, 42-20N 132-20E,…
- HYDROPAC 3131/20 · Exercises2020-10-26 → 2020-10-31Torpedo exercises 262100Z to 312100Z oct in area bound by 41-40N 131-12E, 42-30N 131-12E, 42-30N 133-03E,…
- HYDROPAC 3099/20 · Exercises2020-10-23 → 2020-10-31Gunnery exercises 2200Z to 1000Z daily 24 to 30 oct in area bound by 42-15.0N 131-41.0E 42-40.0N 131-41.0E…
- HYDROPAC 3034/20 · Exercises2020-10-18 → 2020-10-24Torpedo exercises 212100Z to 242100Z oct in area bound by 41-40N 131-12E, 42-30N 131-12E, 42-30N 133-03E,…
- HYDROPAC 2985/20 · Missiles2020-10-14 → 2020-10-24Missile operations 2100Z to 0800Z daily 19 thru 23 oct in area bound by 42-28-00N 131-13-30E, 42-35-36N…
- HYDROPAC 2966/20 · Exercises2020-10-12 → 2020-10-18Torpedo exercises 162100Z to 182100Z oct in area bound by 41-40N 131-12E, 42-30N 131-12E, 42-30N 133-03E,…
- HYDROPAC 2922/20 · Incidents2020-10-09 → 2020-10-23Man overboard from M/V mirai in vicinity 42-11.4N 132-17.9E on 09 oct
- HYDROPAC 2916/20 · Exercises2020-10-08 → 2020-10-16Torpedo exercises 122100Z to 162100Z oct in area bound by 41-40N 131-12E, 42-30N 131-12E, 42-30N 133-03E,…
- HYDROPAC 2852/20 · Exercises2020-10-01 → 2020-10-12Gunnery exercises 2200Z to 1000Z daily 04, 07 thru 09 and 11 oct in area bound by 42-15.0N 131-41.0E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.