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 1271/99 · Cable ops1999-06-19 → 1999-06-29Seismic survey in progress until 28 jun by M/V urania towing 800 meter long cable along trackline joining…
- HYDROLANT 1266/99 · Cable ops1999-06-18 → 1999-06-19Seismic survey 21 thru 25 jun by M/V urania towing 800 meter long cable along tracklines between: a.…
- HYDROLANT 1251/99 · Nav aids1999-06-16 → 1999-09-24Capo palinuro light 40-01.4N 015-16.5E unlit
- HYDROLANT 1238/99 · Ordnance1999-06-14 → 1999-06-16Ordnance detonation 150900Z to 151430Z jun, alternate 160900Z to 161430Z jun within 1000 meters of 41-07.9N…
- HYDROLANT 1236/99 · Nav aids1999-06-14 → 1999-06-16Punta rossa light 42-14.3N 011-06.5E unlit
- HYDROLANT 1220/99 · Ordnance1999-06-12 → 1999-06-12Underwater ordnance detonations 120900Z to 121430Z jun within 1000 meters of 39-26N 009-45E
- HYDROLANT 1204/99 · Nav aids1999-06-10 → 1999-08-13Isola capraia light 43-03.1N 009-50.6E unlit
- HYDROLANT 1156/99 · Cable ops1999-06-05 → 1999-06-18Seismic survey 06 thru 28 jun by M/V urania along trackline joining 40-31.8N 014-20.0E, 41-09.8N 013-29.0E,…
- HYDROLANT 1124/99 · Surveys1999-06-01 → 1999-06-21Survey operations in progress until 20 jun by M/V akademik nicolaj strakhov along trackline joining 41-06.3N…
- HYDROLANT 1123/99 · Exercises1999-06-01 → 1999-06-10Gunnery exercises 0700Z to 1530Z daily 07, 08, and 10 jun in area bound by 40-40N 009-50E, 40-40N 010-50E,…
- HYDROLANT 1122/99 · Exercises1999-06-01 → 1999-06-18Gunnery exercises 0700Z to 1530Z daily 02, 03, 07 thru 11 and 14 thru 18 jun in area bound by 40-00N…
- HYDROLANT 1111/99 · Nav aids1999-06-01 → 1999-06-11Capo san vito light 38-11.2N 012-43.9E unlit
- HYDROLANT 1097/99 · Other1999-05-29 → 1999-08-06Razzoli island light 41-18.4N 009-20.4E at reduced intensity
- HYDROLANT 1077/99 · Ordnance1999-05-26 → 1999-08-06Possible unexploded ordnance: a. within five miles of 44-47.3N 013-08.0E
- HYDROLANT 1074/99 · Nav aids1999-05-26 → 1999-05-26Capo di milazzo light 38-16.1N 015-13.9E unlit
- HYDROLANT 1073/99 · Surveys1999-05-26 → 1999-05-28Underwater survey operations in progress until 25 jun by M/V strakhov towing 500 meter long cable along…
- HYDROLANT 1060/99 · Surveys1999-05-24 → 1999-05-27Survey operations 25 may thru 25 jun by M/V akademik nicolaj strakhov along trackline joining 41-10.8N…
- HYDROLANT 1058/99 · Exercises1999-05-24 → 1999-05-27Gunnery exercises 0600Z to 1530Z daily 26 and 27 may in area bound by 40-00N 010-00E, 40-00N 010-30E, 39-10N…
- HYDROLANT 1050/99 · Nav aids1999-05-23 → 1999-09-24Paola light 39-21.5N 016-02.0E unlit
- HYDROLANT 999/99 · Nav aids1999-05-17 → 1999-08-13Porto baratti light 42-59.6N 010-29.7E 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.