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 417/99 · Cable ops1999-05-14 → 1999-05-20Cable operations 16 thru 21 may by cableship kdd ocean link in area bound by 30-55N 123-00E, 30-53N 123-11E,…
- HYDROPAC 396/99 · Cable ops1999-05-10 → 1999-05-22Cable laying operations 13 thru 21 may by cableship vercors along trackline joining 24-51N 121-50E, 24-51N…
- HYDROPAC 336/99 · Derelicts1999-04-24 → 1999-04-25Fishing vessel adrift and on fire in vicinity 25-05N 122-36E
- HYDROPAC 327/99 · Cable ops1999-04-22 → 1999-05-08Underwater cable operations by cableship kdd ocean link: a. 27 apr thru 01 may in area bound by 30-35N…
- HYDROPAC 238/99 · Cable ops1999-03-27 → 1999-04-06Cable operations 01 thru 05 apr by cableship kdd ocean link in area bound by 30-21N 123-33E, 30-06N 123-53E,…
- USGS-USP000951X · Quakes1999-03-23 → 1999-03-26174 km nw of naze, japan
- HYDROPAC 218/99 · Nav aids1999-03-21 → 1999-03-25Cable marking buoy, yellow, fl y, ra ref, established in 30-31.93N 124-30.25E
- HYDROPAC 201/99 · Cable ops1999-03-16 → 1999-04-15Cable laying operations in progress until 14 apr by cableship maria corina in vicinity of tracklines…
- HYDROPAC 167/99 · Cable ops1999-03-01 → 1999-04-07Cable laying operations 05 mar thru 06 apr by cableship nexus along trackline joining 31-35N 121-55E, 31-34N…
- HYDROPAC 158/99 · Cable ops1999-02-28 → 1999-03-01Cable laying operations 01 mar thru 02 apr by cableship nexus along trackline joining 31-35N 121-55E, 31-34N…
- HYDROPAC 38/99 · Derelicts1999-01-13 → 1999-01-2325 meter fishing vessel partially submerged and adrift in vicinity 30-49.7N 124-28.0E at 122345Z jan
- HYDROPAC 36/99 · Cable ops1999-01-12 → 1999-02-10Submarine cable laying operations 13 jan thru 09 feb by cableship fu lai in vicinity of trackline joining…
- HYDROPAC 30/99 · Cable ops1999-01-11 → 1999-01-12Cable operations in progress until further notice by M/V fu lai between 30-35N 127-45E and 30-35N 128-00E
- HYDROPAC 922/98 · Cable ops1998-12-01 → 1999-01-01Underwater cable operations in progress until 31 dec along trackline joining 31-35-02N 122-21-57E, 31-30-06N…
- USGS-USP0008VXM · Quakes1998-10-03 → 1998-10-06183 km w of naze, japan
- USGS-USP0008Q9F · Quakes1998-06-22 → 1998-06-2536 km ssw of naze, japan
- USGS-USP00088VV · Quakes1997-10-11 → 1997-10-1461 km e of jiufen, taiwan
- USGS-USP000865K · Quakes1997-08-13 → 1997-08-1653 km ene of hirara, japan
- USGS-USP000827P · Quakes1997-05-13 → 1997-05-161 km wnw of satsumasendai, japan
- USGS-USP000800K · Quakes1997-04-05 → 1997-04-08100 km wnw of naze, japan
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.