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 3121/15 · Cable ops2015-12-17 → 2015-12-20Underwater operations in progress until further notice by cableship ile d'aix vicinity 51-18.0N 003-54.2W
- HYDROLANT 2518/15 · Nav aids2015-10-09 → 2015-10-11Bull point light 51-11.9N 004-12.1W unreliable
- HYDROLANT 1686/15 · Cable ops2015-07-10 → 2015-07-15Underwater operations in progress until further notice by cableship pierre de fermat with submersible within…
- HYDROLANT 1604/15 · Nav aids2015-07-01 → 2015-07-01Flat holm light 51-22.5N 003-07.1W unlit
- HYDROLANT 1596/15 · Cable ops2015-06-30 → 2015-06-30Underwater operations in progress until further notice by cableship ile de brehat with submersible along…
- HYDROLANT 1326/15 · Nav aids2015-05-31 → 2015-06-05Dgps station at nash point light 51-24.0N 003-33.1W off air 0800Z to 1600Z daily 01 thru 05 jun
- HYDROLANT 1046/15 · Surveys2015-04-30 → 2015-05-01Underwater operations in progress until further notice by M/V atlantic guardian vicinity of trackline…
- HYDROLANT 1004/15 · Surveys2015-04-25 → 2015-04-26Underwater operations in progress until further notice by M/V atlantic guardian vicinity of trackline…
- HYDROLANT 1003/15 · Surveys2015-04-25 → 2015-04-26Underwater operations in progress until further notice by M/V c-chariot vicinity of trackline between…
- HYDROLANT 978/15 · Surveys2015-04-23 → 2015-04-26Underwater operations in progress until further notice by M/V ikaros 1 vicinity 51-14.9N 003-24.9W
- HYDROLANT 970/15 · Surveys2015-04-22 → 2015-04-25Underwater operations in progress until further notice by M/V atlantic guardian along trackline between…
- HYDROLANT 911/15 · Surveys2015-04-16 → 2015-04-17Underwater operations in progress until further notice by M/V atlantic guardian vicinity 51-15.1N 003-24.6W
- HYDROLANT 905/15 · Surveys2015-04-16 → 2015-04-16Underwater operations in progress until further notice by M/V atlantic guardian vicinity 51-16.5N 003-40.2W
- HYDROLANT 878/15 · Surveys2015-04-13 → 2015-04-15Underwater operations in progress until further notice by M/V atlantic guardian along trackline between…
- HYDROLANT 838/15 · Surveys2015-04-09 → 2015-04-13Underwater operations in progress until further notice by M/V atlantic guardian along trackline between…
- HYDROLANT 832/15 · Surveys2015-04-09 → 2015-04-09Underwater operations in progress until further notice by M/V atlantic guardian along trackline between…
- HYDROLANT 796/15 · Surveys2015-04-05 → 2015-04-09Underwater operations in progress until further notice by M/V atlantic guardian vicinity 51-17.3N 004-02.7W
- HYDROLANT 757/15 · Nav aids2015-03-31 → 2015-03-31Isle of man
- HYDROLANT 719/15 · Nav aids2015-03-25 → 2015-03-27Flat holm light 51-22.5N 003-07.0W unlit
- HYDROLANT 201/15 · Nav aids2015-01-23 → 2015-01-24RACON at west hawk buoy 51-31.4N 004-23.6W inoperative
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.