Tyrrhenian Sea
IHO sea area 28e · 9° to 16° E, 38° to 44° N
- in force
- 0
- last 12 months
- 4
- archive messages
- 862
- categories
- 16
What the archive shows
862 messages are recorded since 1997-01-20 for the Tyrrhenian 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.
Nav aids accounts for 219 of 862 recorded messages (25%), 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
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
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
By category · available archive
| Nav aids | 219 | 25% |
| Exercises | 182 | 21% |
| Surveys | 111 | 13% |
| Incidents | 108 | 13% |
| Ordnance | 57 | 7% |
| Cable ops | 51 | 6% |
| Other | 46 | 5% |
| Derelicts | 34 | 4% |
| Containers | 16 | 2% |
| Wrecks | 11 | 1% |
| Quakes | 9 | 1% |
| Debris | 8 | 1% |
| Towing | 6 | 1% |
| Restricted | 2 | 0% |
| Missiles | 1 | 0% |
| Spills | 1 | 0% |
Archive · 862 cancelled
- HYDROLANT 659/05 · Nav aids2005-04-09 → 2005-04-19Isola santa maria light 41-17.4N 009-23.1E unlit
- HYDROLANT 652/05 · Other2005-04-09 → 2005-04-10Bombing exercises on 09 apr within three miles of 41-17.2N 009-30.2E
- HYDROLANT 637/05 · Surveys2005-04-07 → 2005-04-14Underwater operations 100001Z to 141200Z apr in areas: a. between 41-10N 40-55N and 008-00E 008-40E
- HYDROLANT 586/05 · Ordnance2005-03-31 → 2005-04-02Ordnance drop exercises 01 apr within 4000 meters of 41-18.1N 009-29.0E
- HYDROLANT 584/05 · Exercises2005-03-31 → 2005-04-30Hazardous operations: a. 1100Z to 2200Z daily 04 thru 06, 11 thru 14, 18 thru 21, and 26 thru 28 apr, and…
- HYDROLANT 581/05 · Nav aids2005-03-31 → 2005-04-06Capo spartivento light 38-52.6N 008-50.7E unlit
- HYDROLANT 542/05 · Cable ops2005-03-24 → 2005-04-07Submarine cable operations in progress until further notice by cableship teneo with submersible along…
- HYDROLANT 532/05 · Cable ops2005-03-24 → 2005-03-27Cable operations in progress until further notice by cableship raymond croze along trackline between…
- HYDROLANT 461/05 · Surveys2005-03-10 → 2005-03-15Underwater operations 110700Z to 111200Z and 112300Z to 142359Z mar in area bound by 38-39N 008-30E, 38-40N…
- HYDROLANT 438/05 · Cable ops2005-03-05 → 2005-03-18Cable laying operations 06 mar until further notice by cableship rene descartes along trackline joining…
- HYDROLANT 430/05 · Exercises2005-03-04 → 2005-03-08Gunnery exercises: a. 050900Z to 051100Z mar in area bound by 39-40N 014-30E, 38-57N 014-50E, 38-58N…
- HYDROLANT 417/05 · Cable ops2005-03-01 → 2005-03-04Cable operations in progress until further notice by cableship rene descartes in area bound by 37-50N…
- HYDROLANT 396/05 · Exercises2005-02-28 → 2005-03-31Hazardous operations: a. 1000Z to 2100Z daily 01 thru 03, 07 thru 10, 14 thru 17, 21 thru 24, 29 thru 31 mar…
- HYDROLANT 393/05 · Nav aids2005-02-27 → 2005-04-13Isola santa maria light 41-17.4N 009-23.1E unlit
- HYDROLANT 365/05 · Nav aids2005-02-22 → 2005-05-26Cape comino light 40-31.5N 009-49.7E unlit
- HYDROLANT 290/05 · Exercises2005-02-11 → 2005-02-28Hazardous operations: a. 0800Z to 1900Z daily 14 thru 17, 21 thru 24, 28 feb and 0800Z to 1200Z 18 thru 25…
- HYDROLANT 289/05 · Surveys2005-02-11 → 2005-03-05Underwater operations 13 feb thru 04 mar by M/V flying enterprise in area bound by 37-59N 011-38E, 38-31N…
- HYDROLANT 281/05 · Nav aids2005-02-09 → 2005-02-28Isola santa maria light 41-17.4N 009-23.1E unlit
- HYDROLANT 245/05 · Nav aids2005-02-03 → 2006-02-01Ecueil lavezzi rock buoy 41-19.0N 009-15.3E missing
- HYDROLANT 152/05 · Exercises2005-01-19 → 2005-01-31Hazardous operations: a. 0800Z to 1900Z daily 24 thru 27, 31 jan and 0800Z to 1630Z daily 19 thru 28 jan in…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.