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 2029/00 · Surveys2000-06-05 → 2000-06-06Underwater operations in progress until further notice by M/V geo surveyor vicinity of trackline between…
- HYDROLANT 2018/00 · Surveys2000-06-04 → 2000-06-05Underwater operations in progress until further notice by M/V geo surveyor vicinity of trackline between…
- HYDROLANT 1781/00 · Nav aids2000-05-18 → 2000-05-18HYDROLANT 1781/00
- HYDROLANT 1720/00 · Other2000-05-13 → 2000-05-15Breaksea lightfloat 51-20N 003-19W at reduced intensity
- HYDROLANT 1652/00 · Other2000-05-09 → 2000-05-10Breaksea lightfloat 51-20N 003-19W at reduced intensity
- HYDROLANT 1534/00 · Surveys2000-04-30 → 2000-05-02Underwater operations in progress until further notice by M/V mirfak vicinity of trackline between 51-14.7N…
- HYDROLANT 1383/00 · Surveys2000-04-19 → 2000-04-23Underwater operations in progress until further notice by M/V geo searcher vicinity of trackline between…
- HYDROLANT 1282/00 · Surveys2000-04-11 → 2000-04-14Underwater operations in progress until further notice by M/V geo surveyor along trackline joining 51-19N…
- HYDROLANT 1263/00 · Surveys2000-04-09 → 2000-04-11Underwater operations in progress until further notice by M/V geo surveyor along trackline joining 51-17N…
- HYDROLANT 1136/00 · Surveys2000-04-01 → 2000-04-02Underwater operations in progress until further notice by M/V geo surveyor vicinity of trackline joining…
- HYDROLANT 1063/00 · Surveys2000-03-24 → 2000-03-28Underwater operations in progress until further notice by M/V geo surveyor along trackline joining 51-16N…
- HYDROLANT 1160/99 · Nav aids1999-06-05 → 1999-06-06Lynmouth foreland light 51-15N 003-47W unreliable
- HYDROLANT 831/99 · Nav aids1999-04-27 → 1999-04-27Dgps service at nash point light 51-24N 003-33W unreliable 270800Z to 271200Z apr
- HYDROLANT 662/99 · Surveys1999-04-05 → 1999-04-06Underwater operations in progress until further notice by M/V toisa mariner with submersible in vicinity…
- HYDROLANT 650/99 · Nav aids1999-04-04 → 1999-04-04Lynmouth foreland light 51-14.7N 003-47.2W unreliable
- HYDROLANT 635/99 · Cable ops1999-04-02 → 1999-04-02Cable operations in progress until further notice by M/V toisa mariner with submersible between 51-28N…
- HYDROLANT 624/99 · Cable ops1999-04-01 → 1999-04-02Cable operations in progress until further notice by M/V toisa mariner with submersible in vicinity 51-31.8N…
- HYDROLANT 618/99 · Nav aids1999-03-30 → 1999-03-31Breaksea lightfloat 51-20N 003-19W unreliable
- HYDROLANT 599/99 · Cable ops1999-03-28 → 1999-04-01Cable operations in progress until further notice by M/V toisa mariner with submersible in vicinity 51-31.8N…
- HYDROLANT 596/99 · Nav aids1999-03-27 → 1999-03-28Breaksea lightfloat 51-20N 003-19W unlit
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.