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 1608/01 · Cable ops2001-10-06 → 2001-10-10Cable laying operations in progress until 23 nov by cableship iberus along trackline between 25-13.5N…
- HYDROPAC 1577/01 · Cable ops2001-09-30 → 2001-10-04Cable laying operations in progress until 040001Z oct by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1479/01 · Cable ops2001-09-11 → 2001-10-07Underwater cable operations 16 sep thru 06 oct by M/V northern river in vicinity of trackline joining 24-51N…
- HYDROPAC 1412/01 · Cable ops2001-08-29 → 2001-10-01Cable laying operations in progress until 30 sep vicinity of tracklines joining: a. 30-50.9N 121-53.0E,…
- HYDROPAC 1382/01 · Cable ops2001-08-25 → 2001-09-08Cable laying operations in progress until 080900Z sep by cableship oceanic princess vicinity of trackline…
- USGS-USP000AMMJ · Quakes2001-08-17 → 2001-08-20137 km ne of hirara, japan
- HYDROPAC 1336/01 · Cable ops2001-08-17 → 2001-09-16Submarine cable laying operations in progress until 15 sep by cableship bold endeavour along trackline…
- HYDROPAC 1312/01 · Cable ops2001-08-14 → 2001-08-20Cable laying operations in progress until 201200Z aug by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1288/01 · Cable ops2001-08-10 → 2001-08-14Cable laying operations in progress until 141200Z aug by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1262/01 · Cable ops2001-08-07 → 2001-08-10Cable laying operations in progress until 101200Z aug by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1160/01 · Ordnance2001-07-23 → 2001-08-01Underwater ordnance detonations: a. 231900Z to 241900Z jul within 15 miles of 26-20.0N 125-18.0E
- HYDROPAC 1146/01 · Ordnance2001-07-19 → 2001-07-21Underwater ordnance detonations: a. 231900Z to 241900Z jul within 15 miles of 26-20.0N 125-18.0E
- HYDROPAC 1119/01 · Ordnance2001-07-15 → 2001-07-17Underwater ordnance detonations 0001Z to 1000Z daily: a. 15 jul within 25 miles of 29-30N 126-45E
- HYDROPAC 1095/01 · Cable ops2001-07-12 → 2001-07-16Submarine cable operations in progress until 161200Z jul by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1079/01 · Ordnance2001-07-10 → 2001-07-15Underwater ordnance detonations 0001Z to 1000Z daily: a. 12 jul within 25 miles of 28-00N 125-30E and north…
- HYDROPAC 1075/01 · Cable ops2001-07-09 → 2001-07-11Submarine cable operations in progress until 111200Z jul by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1050/01 · Cable ops2001-07-06 → 2001-07-09Submarine cable operations 060100Z to 082300Z jul by cableship oceanic princess vicinity of trackline…
- HYDROPAC 1013/01 · Cable ops2001-06-30 → 2001-07-06Submarine cable operations 301400Z jun to 052300Z jul by cableship oceanic princess in area bound by 25-10N…
- HYDROPAC 916/01 · Cable ops2001-06-16 → 2001-06-30Cable laying operations 18 jun until further notice by cableship vercors along trackline joining 23-29.0N…
- HYDROPAC 909/01 · Ordnance2001-06-15 → 2001-06-20Underwater ordnance detonations 200001Z to 201100Z jun within 25 miles of 33-00N 123-20E
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.