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 184/02 · Ordnance2002-01-29 → 2002-02-03Underwater ordnance detonations 010001Z to 011000Z feb, alternate 030001Z to 031000Z feb in area bound by…
- HYDROPAC 183/02 · Ordnance2002-01-29 → 2002-02-03Underwater ordnance detonations 310001Z to 311000Z jan, alternate 030001Z to 031000Z feb in area bound by…
- HYDROPAC 182/02 · Ordnance2002-01-29 → 2002-02-03Underwater ordnance detonations 300001Z to 301000Z jan, alternate 030001Z to 031000Z feb in area bound by…
- HYDROPAC 129/02 · Cable ops2002-01-21 → 2002-01-31Underwater cable operations in progress until 30 jan by M/V maersk repeater and M/V fu lai in area bound by…
- HYDROPAC 126/02 · Debris2002-01-20 → 2002-01-2760 meter long fishing net adrift in 29-13.9N 125-41.1E at 200012Z jan
- HYDROPAC 123/02 · Ordnance2002-01-18 → 2002-01-25Ordnance drop exercises 0001Z to 1100Z daily: a. 23 jan within 25 miles of 32-30N 126-10E
- HYDROPAC 107/02 · Ordnance2002-01-16 → 2002-01-21Ordnance drop exercises 0001Z to 1100Z daily: a. 20 jan within 18 miles of 27-00N 124-45E
- HYDROPAC 76/02 · Ordnance2002-01-12 → 2002-01-16Ordnance drop exercises 0001Z to 1100Z daily: a. 16 jan within 18 miles of 32-30N 126-10E
- HYDROPAC 2072/01 · Cable ops2001-12-20 → 2002-01-31Submarine cable operations in progress until 30 jan vicinity of tracklines joining: a. 30-50.9N 121-53.0E,…
- USGS-USP000AU97 · Quakes2001-12-08 → 2001-12-1115 km se of naze, japan
- HYDROPAC 1778/01 · Cable ops2001-11-03 → 2002-01-01Underwater cable operations until 31 dec vicinity of tracklines: a. between 31-48.8N 124-22.8E and 31-48.8N…
- HYDROPAC 1777/01 · Cable ops2001-11-03 → 2001-12-01Underwater cable operations until 30 nov vicinity of tracklines between: a. 31-16.5N 125-12.5E and 31-48.9N…
- USGS-USP000ARY6 · Quakes2001-10-30 → 2001-11-02120 km w of naze, japan
- HYDROPAC 1712/01 · Cable ops2001-10-23 → 2001-11-21Submarine cable operations in progress until 20 nov by cableship iberus vicinity of trackline joining…
- HYDROPAC 1703/01 · Cable ops2001-10-21 → 2001-11-24Cable laying operations in progress until 23 nov by cableship heimdal vicinity of tracklines joining: a.…
- HYDROPAC 1691/01 · Cable ops2001-10-19 → 2001-11-16Underwater cable operations in progress until 15 nov by cableship oceanic king vicinity of trackline joining…
- HYDROPAC 1664/01 · Cable ops2001-10-15 → 2001-11-21Submarine cable operations in progress until 20 nov by cableship bold endeavor vicinity of trackline joining…
- HYDROPAC 1634/01 · Cable ops2001-10-10 → 2001-10-23Cable laying operations in progress until 31 oct by cableship iberus along trackline joining 25-20.1N…
- HYDROPAC 1627/01 · Ordnance2001-10-09 → 2001-10-11Underwater ordnance detonations 132200Z to 140300Z oct vicinity: a. 29-48N 128-47E
- HYDROPAC 1626/01 · Ordnance2001-10-09 → 2001-10-15Underwater ordnance detonations 0001Z to 1100Z daily 10, 12 and 15 oct within 18 miles of trackline joining…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.