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% |
| Other | 6 | 1% |
| Containers | 6 | 1% |
| Wrecks | 4 | 1% |
| Debris | 3 | 1% |
| Volcanic | 3 | 1% |
| Spills | 2 | 0% |
Archive · 544 cancelled
- HYDROPAC 835/14 · Cable ops2014-03-25 → 2014-04-04Cable repair operations 30 mar thru 07 apr by M/V kddi ocean link, alternate 08 thru 11 apr in area bound by…
- USGS-USB000MZMN · Quakes2014-03-02 → 2014-03-05109 km nw of nago, japan
- HYDROPAC 527/14 · Nav aids2014-02-23 → 2014-02-23NAVTEX station naha 26-05N 127-40E off air
- HYDROPAC 4/14 · Incidents2014-01-01 → 2014-02-22Japan to philippines
- HYDROPAC 3940/13 · Cable ops2013-12-19 → 2014-01-01Seismic survey in progress until 31 dec by vessel towing eight 6000 meter long cables in area bound by…
- HYDROPAC 3405/13 · Wrecks2013-11-01 → 2015-07-26East China Sea
- HYDROPAC 2009/13 · Exercises2013-07-10 → 2013-07-11Hazardous operations
- HYDROPAC 2001/13 · Exercises2013-07-09 → 2013-07-10Hazardous operations
- HYDROPAC 1778/13 · Cable ops2013-06-19 → 2013-06-28Cable repair operations in progress until 02 aug in area bound by 33-17.1N 123-46.3E, 33-31.4N 124-07.7E,…
- USGS-USB000GAGM · Quakes2013-04-18 → 2013-04-2162 km ne of yonakuni, japan
- HYDROPAC 3512/12 · Missiles2012-12-10 → 2012-12-12Hazardous operations 2200Z to 0300Z commencing daily until 28 dec in areas bound by: a. 35-44-06N…
- HYDROPAC 3423/12 · Missiles2012-12-03 → 2012-12-10Hazardous operations 2200Z to 0300Z commencing daily 09 thru 21 dec in areas bound by: a. 35-44-06N…
- HYDROPAC 3297/12 · Cable ops2012-11-22 → 2012-11-29Cable repair operations 23 nov thru 02 dec, alternate 03 thru 07 dec by M/V kddi ocean link in area bound by…
- HYDROPAC 2916/12 · Cable ops2012-10-17 → 2013-03-01Cable laying operations 18 oct thru 28 feb 13 vicinity of trackline joining 25-11.5N 121-25.0E, 25-15.8N…
- HYDROPAC 2389/12 · Cable ops2012-08-21 → 2012-12-01Seismic survey in progress until 30 nov by M/V discoverer II in area bound by 32-15N 123-00E, 32-00N…
- HYDROPAC 2384/12 · Incidents2012-08-21 → 2012-08-25Distress signals received on 406 mhz at 210118Z aug in: a. 28-15-03N 135-29-31E
- USGS-USP000JNTB · Quakes2012-07-09 → 2012-07-12101 km ssw of yudomari, japan
- HYDROPAC 1921/12 · Exercises2012-07-06 → 2012-07-20Hazardous operations 1600Z to 1000Z commencing daily 09 thru 14 jul, alternate 1600Z to 1000Z commencing…
- HYDROPAC 954/12 · Incidents2012-04-04 → 2012-05-14M/V new lucky VII, 17 persons on board, unreported
- HYDROPAC 897/12 · Derelicts2012-03-29 → 2012-04-01Derelict 39 ton vessel 79 sinyangho, partially submerged and adrift in 33-11.7N 124-47.9E at 282310Z mar
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.