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
By month (all years)
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 532/01 · Other2001-02-13 → 2001-02-14Pyrotechnics exercises 141300Z to 141500Z feb within one mile of 43-57.6N 009-59.1E
- HYDROLANT 499/01 · Exercises2001-02-10 → 2001-02-12Hazardous operations 121000Z to 121130Z feb within one mile of 43-52.9N 009-51.7E
- HYDROLANT 470/01 · Wrecks2001-02-08 → 2003-01-04Wreck, least depth 22 meters, in 43-58.8N 009-53.3E
- HYDROLANT 447/01 · Other2001-02-07 → 2001-02-08Pyrotechnics exercises 081000Z to 081130Z feb within one mile of 43-52.9N 009-51.7E
- HYDROLANT 445/01 · Other2001-02-07 → 2001-02-15Isola palmaiola light 42-51.9N 010-28.5E at reduced intensity
- HYDROLANT 444/01 · Nav aids2001-02-07 → 2001-02-12Formiche di grosseto light 42-34.6N 010-53.0E unlit
- HYDROLANT 443/01 · Wrecks2001-02-07 → 2001-02-08Wreck, least depth 22 meters, in 43-58.8N 009-58.3E
- HYDROLANT 297/01 · Nav aids2001-01-26 → 2001-02-07Isola palmaiola light 42-51.9N 010-28.5E unlit
- HYDROLANT 295/01 · Other2001-01-25 → 2001-01-27Pyrotechnics exercises 270600Z to 270900Z jan in 42-10N 011-10E
- HYDROLANT 285/01 · Surveys2001-01-25 → 2001-01-27Hydrographic survey 260700Z to 272259Z jan by M/V urania along tracklines between: a. 43-02N 009-31E and…
- HYDROLANT 190/01 · Exercises2001-01-17 → 2001-01-19Gunnery exercises 191000Z to 191800Z jan within 25 miles of 40-43N 010-37E
- HYDROLANT 174/01 · Exercises2001-01-16 → 2001-01-17Gunnery exercises 191000Z to 191800Z and 210700Z to 211100Z jan within 25 miles of: a. 40-43N 010-37E
- HYDROLANT 162/01 · Nav aids2001-01-15 → 2001-01-23Palmaiola island light 42-51.9N 010-28.5E unlit
- HYDROLANT 31/01 · Nav aids2001-01-04 → 2001-01-15Cape pertusato light 41-22.0N 009-11.2E unreliable
- HYDROLANT 4296/00 · Nav aids2000-12-31 → 2001-01-03Ruisseau d'alistro light 42-15.6N 009-32.5E unlit
- HYDROLANT 4272/00 · Other2000-12-29 → 2001-02-01Geophysical operations in progress until 31 jan by M/V urania, M/V vega uno and M/V ariete primo in area…
- HYDROLANT 4192/00 · Surveys2000-12-22 → 2000-12-22Underwater survey in progress until 220400Z dec by M/V argonaut with equipment along trackline between…
- HYDROLANT 4128/00 · Other2000-12-15 → 2000-12-21Underwater survey 182259Z to 212300Z dec by M/V argonaut with equipment along trackline between 41-17.9N…
- HYDROLANT 4127/00 · Exercises2000-12-15 → 2000-12-20Gunnery exercises 0800Z to 1630Z daily 18 thru 20 dec in area bound by 40-15N 010-00E, 40-15N 011-50E,…
- HYDROLANT 4059/00 · Nav aids2000-12-07 → 2001-01-04RACON at ecueil lavezzi light 41-19.0N 009-15.3E off air
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.