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 1557/17 · Cable ops2017-05-02 → 2017-05-31Cable operations in progress until 30 may in area bound by 25-53-49N 122-18-31E, 25-34-40N 122-34-53E,…
- HYDROPAC 1543/17 · Incidents2017-05-01 → 2017-05-19Distress signal received on 406 mhz from M/V suruyu in vicinity 28-30-28N 123-08-09E at 010955Z may
- HYDROPAC 1495/17 · Cable ops2017-04-28 → 2017-05-10Cable operations 03 thru 08 may, alternate 09 thru 13 may by M/V kddi pacific link in area bound by 25-46.6N…
- HYDROPAC 1413/17 · Incidents2017-04-22 → 2017-04-22Distress signal received on 406 mhz in 30-07.5N 126-35.3E at 220240Z apr
- HYDROPAC 500/17 · Incidents2017-02-11 → 2017-03-03Distress signal received on 406 mhz in 30-15-15N 122-07-47E at 110711Z feb
- HYDROPAC 334/17 · Nav aids2017-01-29 → 2017-01-30NAVTEX station naha (g) 26-05.5N 127-40.1E at reduced power 2330Z to 0930Z commencing daily 29 and 30 jan,…
- HYDROPAC 301/17 · Cable ops2017-01-26 → 2017-02-02Cable repair operations 27 jan thru 01 feb, alternate 02 thru 06 feb by M/V kddi ocean link in area bound by…
- HYDROPAC 88/17 · Cable ops2017-01-09 → 2017-04-01Cable operations in progress until 31 mar in area bound by 26-07-00N 121-57-00E, 25-51-54N 121-15-11E,…
- HYDROPAC 84/17 · Cable ops2017-01-08 → 2017-01-13Cable repair operations 09 thru 14 jan, alternate 15 thru 19 jan by M/V kddi ocean link in area bound by…
- HYDROPAC 3928/16 · Cable ops2016-12-19 → 2017-01-17Cable repair operations in progress until 16 jan 17 in vicinity of trackline between 26-20-30.0N…
- HYDROPAC 3762/16 · Incidents2016-12-04 → 2016-12-28Distress signals received on 406 mhz at 040116Z dec in: a. 30-23-56N 135-12-25E
- HYDROPAC 3628/16 · Cable ops2016-11-24 → 2017-02-01Cable operations 25 nov thru 31 jan 17 in area bound by 25-54-14N 121-46-14E, 25-45-12N 121-22-14E,…
- HYDROPAC 3613/16 · Cable ops2016-11-23 → 2016-12-02Cable operations 28 nov thru 03 dec, alternate 04 thru 08 dec by M/V kddi ocean link in area bound by…
- HYDROPAC 3164/16 · Cable ops2016-10-16 → 2016-10-24Cable repair operations 18 thru 22 oct, alternate 23 thru 27 oct by M/V kddi ocean link in area bound by…
- HYDROPAC 3053/16 · Cable ops2016-10-06 → 2016-10-16Cable repair operations 07 thru 13 oct, alternate 14 thru 18 oct by M/V kddi ocean link in area bound by…
- HYDROPAC 2970/16 · Containers2016-09-29 → 2016-10-02Containers adrift in 26-43.4N 121-14.6E at 290915Z sep
- USGS-US10006SP7 · Quakes2016-09-26 → 2016-09-29110 km nne of nago, japan
- HYDROPAC 2077/16 · Nav aids2016-07-10 → 2016-07-12NAVTEX station naha 26-05.5N 127-40.1E at reduced power 2330Z to 0930Z commencing daily 10 and 11 jul,…
- HYDROPAC 1843/16 · Surveys2016-06-19 → 2016-06-20Survey operations 20 and 21 jun by M/V northern endeavour towing two mile long cable in area bound by 25-08N…
- HYDROPAC 1830/16 · Surveys2016-06-18 → 2016-06-19Survey operations 19 and 20 jun by M/V northern endeavour towing two mile long cable in area bound by 25-08N…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.