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 1837/99 · Nav aids1999-08-30 → 1999-11-12Torre scuola light 44-03.0N 009-51.6E unlit
- HYDROLANT 1819/99 · Nav aids1999-08-29 → 1999-09-03Viareggio light 43-51.7N 010-14.8E unlit
- HYDROLANT 1780/99 · Ordnance1999-08-24 → 1999-08-25Underwater ordnance detonations 250800Z to 251800Z aug vicinity 39-37.3N 009-43.5E
- HYDROLANT 1647/99 · Nav aids1999-08-07 → 1999-08-10Lavezzi island light 41-20.1N 009-15.6E unlit
- HYDROLANT 1623/99 · Surveys1999-08-05 → 1999-08-23Survey operations 06 thru 31 aug by M/V urania towing equipment and cables: a. in area between 38-15N 39-45N…
- HYDROLANT 1602/99 · Nav aids1999-08-02 → 1999-08-05Capo comino light 40-32N 009-50E unlit
- HYDROLANT 1576/99 · Nav aids1999-07-31 → 1999-08-03Lavezzi island light 41-20N 009-16E unlit
- HYDROLANT 1512/99 · Nav aids1999-07-22 → 1999-08-13Capo corvo light 44-02.1N 009-56.6E unlit
- HYDROLANT 1502/99 · Wrecks1999-07-20 → 1999-09-14Meloria shoal light 43-35.2N 010-15.5E unlit
- HYDROLANT 1466/99 · Nav aids1999-07-15 → 1999-07-22Lavezzi island light 41-20.1N 009-15.6E unlit
- HYDROLANT 1443/99 · Cable ops1999-07-13 → 1999-07-17Cable operations in progress until further notice by cableship raymond croze vicinity of trackline joining…
- HYDROLANT 1438/99 · Cable ops1999-07-12 → 1999-07-13Underwater cable operations 131000Z jul until further notice by M/V raymond croze in 40-02.35N 014-57.86E
- HYDROLANT 1413/99 · Nav aids1999-07-09 → 1999-07-13Secche della meloria south light 43-32.8N 010-13.2E unlit
- HYDROLANT 1336/99 · Surveys1999-06-28 → 1999-07-18Oceanographic operations 01 thru 17 jul by M/V alliance in area bound by 42-42N 010-35E, 42-35N 010-55E,…
- HYDROLANT 1335/99 · Nav aids1999-06-28 → 1999-06-30South meloria bank light 43-32.7N 010-13.2E unlit
- HYDROLANT 1315/99 · Surveys1999-06-25 → 1999-07-01Underwater survey operations 29 and 30 jun by M/V alliance in area bound by 43-44N 009-50E, 43-44N 010-10E,…
- HYDROLANT 1294/99 · Nav aids1999-06-23 → 1999-06-23Capo palinuro light 40-01.4N 015-16.5E unlit
- HYDROLANT 1293/99 · Nav aids1999-06-23 → 1999-06-23Punta polveraia light 42-47.6N 010-06.6E unlit
- HYDROLANT 1292/99 · Surveys1999-06-22 → 1999-06-29Survey operations in progress until 28 jun by vessel towing equipment within one mile of trackline joining…
- HYDROLANT 1288/99 · Surveys1999-06-22 → 1999-06-30Survey operations in progress until 29 jun by M/V grecale secondo towing 500 meter long cable along…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.