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 1677/03 · Cable ops2003-09-27 → 2003-10-06Cable repair operations 30 sep thru 04 oct, alternate 05 thru 07 oct by M/V kdd pacific link in area bound…
- HYDROPAC 1649/03 · Cable ops2003-09-25 → 2003-12-01Seismic survey 260001Z sep to 302359Z nov by vessel towing 4000 meter long cable in area bound by 28-20N…
- HYDROPAC 1600/03 · Cable ops2003-09-17 → 2003-10-11Seismic survey 180001Z sep to 110001Z oct by vessel towing 5000 meter long cable in area bound by 29-12.0N…
- HYDROPAC 1573/03 · Ordnance2003-09-13 → 2003-09-14Underwater ordnance detonations 0001Z to 1200Z daily: a. 15 sep in area between 28-10N 27-30N and 125-07E…
- HYDROPAC 1360/03 · Cable ops2003-08-07 → 2003-08-19Cable repair operations in progress until 18 aug by cableship cable retriever vicinity of trackline between…
- USGS-USP000C22U · Quakes2003-07-09 → 2003-07-1273 km sw of kurio, japan
- HYDROPAC 982/03 · Incidents2003-06-07 → 2003-07-1947 ton F/V ming fu tsai NO.16, white hull, eight persons on board, unreported
- HYDROPAC 909/03 · Cable ops2003-05-28 → 2003-07-31Seismic survey in progress until 30 jul in area bound by 28-00N 121-20E, 28-20N 123-00E, 26-40N 123-00E,…
- HYDROPAC 816/03 · Cable ops2003-05-12 → 2003-07-21Seismic survey in progress until 20 jul by vessel towing 800 meter long cable in area bound by 29-22N…
- HYDROPAC 793/03 · Other2003-05-07 → 2003-05-12Acoustic operations 0001Z to 1300Z daily: a. 07 may in area bound by 26-07N 122-35E, 25-45N 123-02E, 25-41N…
- HYDROPAC 785/03 · Ordnance2003-05-06 → 2003-05-07Underwater ordnance detonations 0001Z to 1300Z daily: a. 07 may in area bound by 26-07N 122-35E, 25-45N…
- HYDROPAC 778/03 · Ordnance2003-05-05 → 2003-05-06Underwater ordnance detonations 0001Z to 1300Z daily 07 thru 12 may in areas bound by: a. 27-23N 124-44E,…
- HYDROPAC 682/03 · Incidents2003-04-19 → 2003-04-26Derelict vessel, blue hull, capsized and adrift in 27-42N 125-43E at 190313Z apr
- HYDROPAC 285/03 · Incidents2003-02-16 → 2003-02-16Distress signal received on 406 mhz in 27-09N 123-32E
- HYDROPAC 88/03 · Incidents2003-01-17 → 2003-01-1917 ton F/V sheng fu shiang, white hull, seven persons on board, unreported
- HYDROPAC 2285/02 · Incidents2002-12-04 → 2003-01-18Man overboard from M/V hanjin london vicinity of trackline between 30-42N 125-14E at 040001Z dec and 29-27N…
- HYDROPAC 2145/02 · Incidents2002-11-19 → 2003-01-04Distress signal received on 121.5 mhz vicinity 30-47-49N 127-26-16E at 191246Z nov
- HYDROPAC 2098/02 · Ordnance2002-11-13 → 2002-11-19Underwater ordnance detonations: a. 150900Z to 171459Z nov vicinity of trackline joining 32-04N 127-15E,…
- HYDROPAC 2044/02 · Cable ops2002-11-01 → 2002-11-13Cable repair operations in progress until 12 nov by M/V koushin maru in area bound by 25-49.2N 122-19.6E,…
- HYDROPAC 1969/02 · Incidents2002-10-22 → 2002-12-07Distress signal received on 406 mhz in 26-20.8N 121-12.8E
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.