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 251/02 · Surveys2002-02-01 → 2002-02-06Oceanographic operations in progress until further notice by M/V urania in area bound by 41-26N 012-27E,…
- HYDROLANT 250/02 · Ordnance2002-02-01 → 2002-02-04Underwater ordnance detonations 0700Z to 1700Z daily 04 thru 07 feb within one mile of 43-59-00N 009-55-30E
- HYDROLANT 217/02 · Exercises2002-01-29 → 2002-02-28Gunnery exercises 0800Z to 1630Z daily: a. 01 thru 28 feb, except saturdays and sundays, in area bound by…
- HYDROLANT 211/02 · Nav aids2002-01-29 → 2002-01-29Diga foranea light 38-07.6N 013-22.5E unlit
- HYDROLANT 205/02 · Cable ops2002-01-28 → 2002-02-12Submarine cable operations in progress until 11 feb by M/V certamen between 40-34N 014-12E and 40-42N 013-54E
- HYDROLANT 202/02 · Containers2002-01-28 → 2002-02-04Container adrift vicinity 43-43N 009-55E
- HYDROLANT 198/02 · Cable ops2002-01-27 → 2002-01-28Underwater cable operations by M/V certamen along trackline joining 40-39-55N 014-47-15E, 40-27-41N…
- HYDROLANT 185/02 · Cable ops2002-01-25 → 2002-01-27Submarine cable operations in progress until 11 feb by M/V certamen between 40-34N 014-12E and 40-42N 013-54E
- HYDROLANT 173/02 · Surveys2002-01-24 → 2002-01-31Oceanographic operations in progress until further notice by M/V urania in area bound by 41-12.7N 013-42.0E,…
- HYDROLANT 160/02 · Ordnance2002-01-22 → 2002-01-25Underwater ordnance detonations 0700Z to 1700Z daily 24 and 25 jan in area bound by 44-03.0N 009-56.9E,…
- HYDROLANT 109/02 · Surveys2002-01-15 → 2002-01-26Oceanographic operations 16 thru 25 jan by M/V the president in area bound by 40-47.6N 013-28.0E, 40-46.8N…
- HYDROLANT 108/02 · Nav aids2002-01-15 → 2002-01-31Civitavecchia radiobeacon 42-05.9N 011-49.1E unreliable 15 thru 30 jan
- HYDROLANT 107/02 · Cable ops2002-01-15 → 2002-01-25Underwater cable operations 16 jan until further notice by M/V certamen vicinity trackline joining 40-39.9N…
- HYDROLANT 83/02 · Nav aids2002-01-12 → 2002-01-17Monte poro light 42-43.6N 010-14.3E unlit
- HYDROLANT 71/02 · Ordnance2002-01-10 → 2002-01-16Underwater ordnance detonations 0700Z to 1700Z daily 14 thru 16 jan within one mile of 43-59-00N 009-55-30E
- HYDROLANT 41/02 · Ordnance2002-01-07 → 2002-01-10Underwater ordnance detonations 0700Z to 1700Z daily 09 and 10 jan within one mile of 43-59-00N 009-55-30E
- HYDROLANT 23/02 · Exercises2002-01-04 → 2002-01-09Gunnery exercises 07 thru 11, 14 thru 19, 21 thru 25 and 28 thru 31 jan in area bound by 39-50N 009-40E,…
- HYDROLANT 22/02 · Exercises2002-01-04 → 2002-01-07Gunnery exercises 07 thru 12, 14, 16 thru 19, 21 thru 26 and 28 thru 31 jan in area bound by 38-57-00N…
- HYDROLANT 21/02 · Exercises2002-01-04 → 2002-01-31Gunnery exercises 0800Z to 1630Z daily: a. 07 thru 31 jan, except saturdays and sundays, in area bound by…
- HYDROLANT 3309/01 · Nav aids2001-12-31 → 2002-01-04Rocchetta light 42-55.2N 010-31.5E 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.