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
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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 1382/23 · Exercises2023-04-26 → 2023-05-13Hazardous operations 2200Z to 0800Z daily 01 thru 05, 07 and 09 thru 12 may in area bound by 42-15.00N…
- HYDROPAC 1244/23 · Incidents2023-04-14 → 2023-04-28Distress signals received on 406 mhz at 141047Z apr in: a. 44-56.17N 154-19.39E
- HYDROPAC 1144/23 · Exercises2023-04-05 → 2023-04-20Gunnery exercises 2200Z to 0800Z daily 09 thru 14 and 16 thru 19 apr in area bound by 42-40.00N 131-41.00E,…
- HYDROPAC 1038/23 · Exercises2023-03-27 → 2023-04-10Gunnery exercises 2200Z to 0800Z daily 31 mar, 02 thru 07 and 09 apr in area bound by 42-38.50N 132-15.00E,…
- HYDROPAC 950/23 · Missiles2023-03-21 → 2023-03-27Missile operations 1400Z to 0800Z daily 26 thru 30 mar in area bound by 42-37.30N 133-11.70E, 42-51.60N…
- HYDROPAC 792/23 · Exercises2023-03-09 → 2023-03-25Gunnery exercises 2200Z to 0800Z daily 12 thru 24 mar in area bound by 42-40.00N 131-41.00E 42-40.00N…
- HYDROPAC 710/23 · Missiles2023-03-03 → 2023-03-11Missile operations 1400Z to 0800Z daily 03 thru 06 and 08 thru 10 mar in area bound by 50-16.00N 140-28.20E,…
- HYDROPAC 606/23 · Exercises2023-02-23 → 2023-03-10Gunnery exercises 2200Z to 0800Z daily 26 feb thru 09 mar in area bound by 42-40.0N 131-41.0E 42-40.0N…
- HYDROPAC 599/23 · Exercises2023-02-22 → 2023-02-23Gunnery exercises 2200Z to 0800Z daily 26 feb thru 09 mar in area bound by 42-40.00N 131-41.00E, 42-40.00N…
- HYDROPAC 457/23 · Exercises2023-02-10 → 2023-02-28Gunnery exercises 2200Z to 0800Z daily 12 thru 27 feb in area bound by 42-40.00N 131-41.00E, 42-40.00N…
- HYDROPAC 455/23 · Exercises2023-02-10 → 2023-02-10Gunnery exercises 2200Z to 0800Z daily 12 thru 27 feb in area bound by 42-23.50N 131-01.70E, 42-32.10N…
- HYDROPAC 451/23 · Exercises2023-02-09 → 2023-02-10Gunnery exercises 2200Z to 0800Z daily 12 thru 27 feb in area bound by 42-23.50N 131-01.70E, 42-32.10N…
- HYDROPAC 3435/22 · Exercises2022-12-02 → 2022-12-10Hazardous operations 2200Z to 1000Z daily 06 thru 09 dec in area bound by 42-38.50N 132-15.00E, 42-40.00N…
- HYDROPAC 3411/22 · Exercises2022-11-30 → 2022-12-02Gunnery exercises 010001Z to 011200Z and 012200Z to 021000Z dec in area bound by 42-40.00N 131-41.00E,…
- HYDROPAC 3239/22 · Missiles2022-11-15 → 2022-11-30Missile operations 1400Z to 0800Z daily 20 thru 29 nov in area bound by 42-23.50N 131-01.70E, 42-32.10N…
- HYDROPAC 3230/22 · Exercises2022-11-14 → 2022-11-18Gunnery exercises 2200Z to 0800Z daily 16 and 17 nov in area bound by 42-40.00N 131-41.00E, 42-40.00N…
- HYDROPAC 3086/22 · Exercises2022-11-02 → 2022-11-11Gunnery exercises 0001Z to 0800Z daily 07 and 11 nov in area within five miles of 45-32.00N 141-18.50E
- HYDROPAC 3017/22 · Exercises2022-10-27 → 2022-11-05Gunnery exercises 2200Z to 1000Z daily 31 oct thru 04 nov in area bound by 42-38.50N 132-15.00E, 42-40.00N…
- HYDROPAC 2948/22 · Exercises2022-10-20 → 2022-10-22Gunnery exercises 0001Z to 0800Z daily 25, 27 and 28 oct in area within five miles of 45-32.00N 141-18.50E
- HYDROPAC 2847/22 · Exercises2022-10-11 → 2022-10-16Gunnery exercises 2200Z to 0800Z daily 11 thru 14 oct and 150801Z to 161400Z oct in area bound by 42-38.50N…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.