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 3130/21 · Cable ops2021-11-01 → 2021-11-08Cable operations 03 thru 10 nov, alternate 11 thru 16 nov by cableship fu hai in area bound by 29-53.5N…
- HYDROPAC 2982/21 · Cable ops2021-10-18 → 2021-10-25Cable operations 19 thru 23, alternate 24 thru 30 oct by cableship fu hai in area bound by 30-22.7N…
- HYDROPAC 2890/21 · Cable ops2021-10-10 → 2021-10-21Cable operations 11 thru 15, alternate 16 thru 20 oct by cableship fu hai in area bound by 30-44.4N…
- HYDROPAC 2049/21 · Cable ops2021-07-15 → 2021-07-21Cable operations by cableship kddi ocean link: a. 16 thru 21 jul, alternate 22 thru 24 jul in area bound by…
- HYDROPAC 1967/21 · Cable ops2021-07-06 → 2021-07-13Cable operations 06 thru 20 jul, alternate 21 jul thru 03 aug by cableship segero along trackline joining…
- HYDROPAC 1932/21 · Cable ops2021-07-01 → 2021-07-06Cable operations 06 jul thru 20 aug by cableship segero in area bound by 32-23.5N 126-57.6E, 32-13.5N…
- HYDROPAC 1872/21 · Cable ops2021-06-25 → 2021-07-05Cable operations 251600Z jun until further notice by cableship lodbrog in area bound by 25-55.1N 122-58.0E,…
- HYDROPAC 1402/21 · Cable ops2021-05-11 → 2021-05-17Cable operations 111600Z may until further notice by cableship lodbrog in area bound by 25-32.9N 121-28.3E,…
- USGS-US7000DZMA · Quakes2021-05-03 → 2021-05-06160 km n of ishigaki, japan
- USGS-US6000DWW9 · Quakes2021-03-26 → 2021-03-29149 km n of hirara, japan
- HYDROPAC 931/21 · Incidents2021-03-24 → 2021-03-24F/V nam sung unreported
- HYDROPAC 288/21 · Incidents2021-01-21 → 2021-01-22Distress signal received on 406 mhz in 26-59N 123-12E at 212124Z jan
- HYDROPAC 109/21 · Cable ops2021-01-10 → 2021-02-11Cable operations 11 thru 26 jan, alternate 27 jan thru 16 feb by cableship kddi ocean link in areas bound…
- HYDROPAC 3839/20 · Cable ops2020-12-25 → 2021-01-05Cable operations 26 dec thru 02 jan 21, alternate 03 thru 10 jan 21 by M/V miraero in vicinity of trackline…
- HYDROPAC 3784/20 · Cable ops2020-12-21 → 2020-12-26Cable operations 19 thru 24 dec, alternate 25 dec thru 02 jan 21 by cableship kddi ocean link in area bound…
- HYDROPAC 3743/20 · Cable ops2020-12-18 → 2020-12-21Cable operations 19 thru 24 dec alternate 25 dec thru 02 jan 21 by cableship kddi ocean link in area bound…
- HYDROPAC 3574/20 · Cable ops2020-12-03 → 2020-12-21Cable operations 04 thru 18 dec, alternate 19 thru 28 dec by cableship bold maverick in area bound by…
- HYDROPAC 2818/20 · Cable ops2020-09-28 → 2020-10-06Cable operations 29 sep thru 04 oct, alternate 05 thru 08 oct by cableship kddi ocean link in area bound by…
- HYDROPAC 2507/20 · Incidents2020-08-27 → 2020-09-11Distress signal received in 27-43N 123-30E at 272207Z aug
- HYDROPAC 2469/20 · Incidents2020-08-24 → 2020-09-11Distress signal received in vicinity 25-58N 121-49E at 240223Z aug
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.