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 4031/00 · Exercises2000-12-04 → 2000-12-07Gunnery exercises 071200Z to 071400Z dec within 20 miles of 40-00N 012-00E
- HYDROLANT 4001/00 · Exercises2000-12-01 → 2000-12-07Hazardous operations 0500Z to 0800Z daily 05 thru 07 dec within 300 meters of 44-02.8N 009-51.4E
- HYDROLANT 3933/00 · Surveys2000-11-24 → 2000-12-04Survey operations 27 nov thru 03 dec by M/V alliance and M/V manning towing equipment in areas bound by: a.…
- HYDROLANT 3932/00 · Surveys2000-11-24 → 2000-11-24Hydrographic survey in progress until 242259Z nov by M/V geo surveyor along trackline joining 41-16.9N…
- HYDROLANT 3931/00 · Other2000-11-24 → 2000-11-29Pyrotechnic exercises 28 nov within one mile of 43-54N 009-55E
- HYDROLANT 3909/00 · Surveys2000-11-22 → 2000-11-24Hydrographic survey 221100Z to 241100Z nov by M/V geo surveyor along trackline joining 41-16.9N 012-04.8E,…
- HYDROLANT 3870/00 · Surveys2000-11-17 → 2000-11-20Hydrographic survey in progress until 202259Z nov by M/V geo surveyor along trackline joining 41-16.9N…
- HYDROLANT 3842/00 · Cable ops2000-11-14 → 2000-11-21Submarine cable operations 15 thru 20 nov by M/V certamen within two miles of 43-23.2N 010-11.0E
- HYDROLANT 3840/00 · Surveys2000-11-14 → 2000-11-17Hydrographic surveys by M/V geo surveyor: a. 142259Z to 151100Z nov along trackline joining 41-51.7N…
- HYDROLANT 3832/00 · Surveys2000-11-14 → 2000-11-14Hydrographic surveys by M/V geo surveyor: a. 132259Z to 141100Z nov along trackline joining 41-51.7N…
- HYDROLANT 3801/00 · Surveys2000-11-10 → 2000-11-13Underwater survey operations 121100Z to 132259Z nov by M/V geo surveyor along trackline joining 41-16.9N…
- HYDROLANT 3799/00 · Surveys2000-11-10 → 2000-11-12Underwater survey operations in progress until 121100Z nov by M/V geo surveyor along trackline joining…
- HYDROLANT 3794/00 · Nav aids2000-11-10 → 2000-11-13Lavezzi light 41-20.1N 009-15.6E unlit
- HYDROLANT 3788/00 · Nav aids2000-11-10 → 2000-11-24Ecueil lavezzi light 41-19.0N 009-15.3E unlit
- HYDROLANT 3776/00 · Nav aids2000-11-09 → 2000-11-09Ecueil lavezzi light 41-19.0N 009-15.3E unreliable
- HYDROLANT 3772/00 · Nav aids2000-11-09 → 2000-11-09Ecueil lavezzi light 41-19.0N 009-15.3E unlit
- HYDROLANT 3735/00 · Exercises2000-11-06 → 2000-11-07Gunnery exercises 071230Z to 071430Z nov in area bound by 44-00N 009-53E, 44-00N 009-39E, 43-53N 009-46E,…
- HYDROLANT 3734/00 · Ordnance2000-11-06 → 2000-11-09Underwater ordnance detonations 0400Z to 0700Z daily 08 and 09 nov within 300 meters of 44-02.8N 009-51.4E…
- HYDROLANT 3692/00 · Exercises2000-11-02 → 2000-11-06Gunnery exercises 060830Z to 061130Z nov in area bound by 44-00N 009-53E, 44-00N 009-39E, 43-53N 009-46E,…
- HYDROLANT 3600/00 · Other2000-10-23 → 2001-01-05Palmaiola island light 42-51.9N 010-28.5E at reduced intensity
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.