Eastern China Sea
IHO sea area 50 · 118° to 131° E, 24° to 33° N
- in force
- 1
- last 12 months
- 7
- archive messages
- 545
- categories
- 15
What the archive shows
545 messages are recorded since 1977-02-05 for the Eastern China 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.
Cable ops accounts for 220 of 545 recorded messages (40%), 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 2023-07-28 08:00ZA large buoy exists in the East China Sea at 31 degrees north, 124 degrees east.
In force now · 1
Longest in force
By year
77
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
| Cable ops | 220 | 40% |
| Incidents | 129 | 24% |
| Quakes | 100 | 18% |
| Ordnance | 24 | 4% |
| Nav aids | 14 | 3% |
| Surveys | 11 | 2% |
| Derelicts | 8 | 1% |
| Exercises | 8 | 1% |
| Missiles | 7 | 1% |
| Containers | 6 | 1% |
| Other | 6 | 1% |
| Wrecks | 4 | 1% |
| Volcanic | 3 | 1% |
| Debris | 3 | 1% |
| Spills | 2 | 0% |
Archive · 544 cancelled
- HYDROPAC 890/01 · Ordnance2001-06-11 → 2001-06-15Underwater ordnance detonations 150001Z to 151100Z jun within 18 miles of 33-00N 123-20E
- HYDROPAC 836/01 · Cable ops2001-05-31 → 2001-07-01Seismic survey in progress until 30 jun in area bound by 29-02.5N 125-00.0E, 29-02.5N 125-15.0E, 28-40.7N…
- HYDROPAC 793/01 · Cable ops2001-05-24 → 2001-07-25Seismic survey 25 may thru 24 jul by M/V kagaku I towing 1500 meter long cable in area bound by 28-50N…
- HYDROPAC 784/01 · Cable ops2001-05-22 → 2001-05-24Seismic survey in progress until 20 jun by M/V funto 7 towing 2000 meter long cable in area bound by 27-00N…
- HYDROPAC 637/01 · Surveys2001-04-27 → 2001-05-03Underwater operations 28 apr thru 02 may by M/V joides resolution vicinity 24-48N 122-30E
- HYDROPAC 523/01 · Incidents2001-04-09 → 2001-05-25Distress signal received on 406 mhz from vessel lin hai 24 in 27-23N 122-47E at 090152Z apr
- HYDROPAC 463/01 · Incidents2001-03-27 → 2001-05-11Man overboard from F/V hongwon ho vicinity 27-35N 123-41E at 262200Z mar
- HYDROPAC 430/01 · Incidents2001-03-21 → 2001-05-04Distress signal received on 406 mhz from vessel nam yang ho in 29-47-49N 124-06-39E at 210458Z mar
- USGS-USP000AAYC · Quakes2001-03-05 → 2001-03-0851 km wnw of naze, japan
- HYDROPAC 290/01 · Cable ops2001-02-21 → 2001-04-01Submarine cable operations in progress until 31 mar by vessel vicinity of tracklines joining: a. 31-28.8N…
- HYDROPAC 1557/00 · Nav aids2000-10-23 → 2003-05-17Superbuoy odas 28-10N 126-20E removed
- HYDROPAC 1523/00 · Incidents2000-10-16 → 2000-12-01Three ton vessel uchida maru, white hull, one person on board, unreported vicinity naze (28-24N 129-30E)
- USGS-USP000A14Y · Quakes2000-10-02 → 2000-10-05128 km n of naze, japan
- USGS-USP000A14X · Quakes2000-10-02 → 2000-10-05119 km n of naze, japan
- HYDROPAC 1382/00 · Cable ops2000-09-18 → 2000-10-11Cable laying operations in progress until 10 oct by cableship toisa coral vicinity of trackline joining…
- HYDROPAC 1292/00 · Containers2000-08-30 → 2000-09-06Numerous containers adrift vicinity 31-33N 123-23E at 301745Z aug
- HYDROPAC 1281/00 · Cable ops2000-08-29 → 2000-10-01Underwater cable repair operations in progress until 30 sep by cableship cable retriever vicinity of…
- HYDROPAC 1261/00 · Derelicts2000-08-24 → 2000-08-3087 meter barge adrift in 25-13N 122-43E on 22 aug
- HYDROPAC 1196/00 · Ordnance2000-08-12 → 2000-08-13Underwater ordnance detonations 130300Z to 131100Z aug in 26-58N 124-32E
- HYDROPAC 1195/00 · Ordnance2000-08-12 → 2000-08-14Underwater ordnance detonations 140300Z to 141100Z aug in 33-00N 125-00E
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.