Bristol Channel
IHO sea area 20 · -5° to -2° E, 51° to 52° N
- in force
- 0
- last 12 months
- 1
- archive messages
- 265
- categories
- 9
What the archive shows
265 messages are recorded since 1997-07-03 for the Bristol Channel. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Nav aids accounts for 135 of 265 recorded messages (51%), 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.
In force now · 0
Nothing in force in this sea right now.
By year
97
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
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
By category · available archive
| Nav aids | 135 | 51% |
| Cable ops | 54 | 20% |
| Surveys | 50 | 19% |
| Wrecks | 11 | 4% |
| Ordnance | 6 | 2% |
| Other | 3 | 1% |
| Containers | 3 | 1% |
| Restricted | 2 | 1% |
| Incidents | 1 | 0% |
Archive · 265 cancelled
- HYDROLANT 678/01 · Cable ops2001-02-26 → 2001-02-27Underwater operations in progress until further notice by cableship sovereign vicinity 51-20N 003-51W
- HYDROLANT 661/01 · Cable ops2001-02-24 → 2001-02-26Underwater operations in progress until further notice by cableship sovereign vicinity 51-20N 003-51W
- HYDROLANT 650/01 · Cable ops2001-02-23 → 2001-02-23Underwater operations in progress until further notice by cableship sovereign vicinity 51-20N 003-49W
- HYDROLANT 540/01 · Surveys2001-02-13 → 2001-02-15Underwater operations in progress until further notice by vessel dpfv seahorse vicinity of trackline between…
- HYDROLANT 486/01 · Nav aids2001-02-09 → 2001-02-13RACON at west helwick buoy 51-31N 004-24W inoperative
- HYDROLANT 356/01 · Cable ops2001-01-30 → 2001-02-03Underwater operations in progress until further notice by cableship seaworker vicinity of trackline between…
- HYDROLANT 306/01 · Surveys2001-01-26 → 2001-01-27Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-22.2N…
- HYDROLANT 279/01 · Surveys2001-01-24 → 2001-01-25Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-21N…
- HYDROLANT 241/01 · Surveys2001-01-20 → 2001-01-22Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-15N…
- HYDROLANT 237/01 · Surveys2001-01-20 → 2001-01-20Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-15N…
- HYDROLANT 98/01 · Surveys2001-01-09 → 2001-01-15Underwater operations in progress until further notice by M/V seaworker within two miles of 51-06.6N 004-16.0W
- HYDROLANT 4223/00 · Surveys2000-12-24 → 2000-12-25Underwater operations in progress until further notice by M/V ares within one mile of 51-19N 003-54W
- HYDROLANT 4196/00 · Surveys2000-12-22 → 2000-12-23Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-22N…
- HYDROLANT 4179/00 · Surveys2000-12-21 → 2000-12-21Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-21N…
- HYDROLANT 4176/00 · Surveys2000-12-20 → 2000-12-21Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-17N…
- HYDROLANT 4175/00 · Surveys2000-12-20 → 2000-12-20Underwater operations in progress until further notice by M/V ares vicinity of trackline between 51-21N…
- HYDROLANT 4151/00 · Surveys2000-12-18 → 2001-01-06Underwater operations in progress until further notice by M/V seaworker vicinity of trackline joining 51-17N…
- HYDROLANT 4058/00 · Surveys2000-12-07 → 2000-12-08Underwater operations in progress until further notice by M/V edt ares vicinity of trackline between…
- HYDROLANT 2195/00 · Nav aids2000-06-19 → 2000-06-19Mumbles light 51-34N 003-58W unlit
- HYDROLANT 2039/00 · Surveys2000-06-06 → 2000-06-08Underwater operations in progress until further notice by M/V geo surveyor vicinity of trackline between…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.