Aegean Sea
IHO sea area 28h · 23° to 28° E, 35° to 41° N
- in force
- 3
- last 12 months
- 3
- archive messages
- 1,492
- categories
- 11
What the archive shows
1,492 messages are recorded since 1997-11-14 for the Aegean 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.
Exercises accounts for 1,129 of 1,492 recorded messages (76%), 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.
- An older warning still listed in force · issued 2026-02-03 17:37ZHazardous operations take place daily in the Aegean Sea until 14 June and from 16 September to 31 December, in a defined area.
In force now · 3
- HYDROLANT 237/26 · Missiles2026-02-03Missile operations occur daily Wednesday through Saturday in the Aegean Sea until June 14 and September 16 through December 31.
- HYDROLANT 238/26 · Exercises2026-02-03Hazardous operations occur daily 0500Z to 1500Z until 14 June and 16 September to 31 December, excluding Fridays, Saturdays, Sundays, and holidays, in Aegean Sea area.
- HYDROLANT 236/26 · Exercises2026-02-03Hazardous operations take place daily in the Aegean Sea until 14 June and from 16 September to 31 December, in a defined area.
Longest in force
- HYDROLANT 236/26 · Exercises2026-02-03Hazardous operations take place daily in the Aegean Sea until 14 June and from 16 September to 31 December, in a defined area.
- HYDROLANT 238/26 · Exercises2026-02-03Hazardous operations occur daily 0500Z to 1500Z until 14 June and 16 September to 31 December, excluding Fridays, Saturdays, Sundays, and holidays, in Aegean Sea area.
- HYDROLANT 237/26 · Missiles2026-02-03Missile operations occur daily Wednesday through Saturday in the Aegean Sea until June 14 and September 16 through December 31.
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
25
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
By category · available archive
| Exercises | 1,129 | 76% |
| Surveys | 143 | 10% |
| Cable ops | 87 | 6% |
| Missiles | 49 | 3% |
| Quakes | 33 | 2% |
| Incidents | 22 | 1% |
| Nav aids | 12 | 1% |
| Other | 7 | 0% |
| Ordnance | 6 | 0% |
| Debris | 2 | 0% |
| Mines | 2 | 0% |
Archive · 1,489 cancelled
- HYDROLANT 3678/20 · Cable ops2020-11-26 → 2020-12-02Cable operations in progress until further notice by cableship normand pacific in 36-20.13N 023-07.54E wide…
- HYDROLANT 3657/20 · Exercises2020-11-25 → 2020-11-26Hazardous operations 260600Z to 261000Z nov in area bound by 37-24.0N 026-00.0E, 37-31.0N 026-21.0E,…
- HYDROLANT 3656/20 · Exercises2020-11-25 → 2020-11-25Hazardous operations 250600Z to 251000Z nov in area bound by 40-30.00N 025-53.00E, 40-35.00N 024-58.00E,…
- HYDROLANT 3655/20 · Exercises2020-11-25 → 2020-11-25Hazardous operations 250600Z to 251000Z nov in area bound by 38-09.38N 026-12.48E, 38-00.00N 025-45.00E,…
- HYDROLANT 3654/20 · Cable ops2020-11-25 → 2020-12-14Underwater operations in progress until further notice by cableship atalanti along trackline joining…
- HYDROLANT 3653/20 · Surveys2020-11-25 → 2020-11-26Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 35-24.76N 024-55.81E,…
- HYDROLANT 3652/20 · Surveys2020-11-25 → 2020-11-26Underwater operations by M/V urbano monti: a. in progress thru 26 nov along trackline joining 36-20.7N…
- HYDROLANT 3644/20 · Exercises2020-11-24 → 2020-11-25Gunnery exercises 241800Z to 250300Z nov in area bound by 36-55N 023-05E, 37-12N 023-05E, 37-12N 023-20E,…
- HYDROLANT 3643/20 · Surveys2020-11-24 → 2020-11-25Underwater operations by M/V urbano monti: a. 24 and 25 nov along trackline joining 36-58.4N 025-23.7E,…
- HYDROLANT 3642/20 · Surveys2020-11-24 → 2020-11-25Underwater operations by M/V ievoli ivory: a. 24 nov along trackline joining 35-27.13N 024-55.83E, 35-25.46N…
- HYDROLANT 3632/20 · Surveys2020-11-23 → 2020-11-28Underwater operations by M/V aegaeo: a. 240500Z to 240800Z and 271000Z to 271700Z nov in 35-43.86N 025-07.28E
- HYDROLANT 3615/20 · Exercises2020-11-21 → 2020-11-23Hazardous operations 230600Z to 231000Z nov in area bound by 39-25.17N 025-55.00E, 39-00.00N 025-18.00E,…
- HYDROLANT 3614/20 · Exercises2020-11-21 → 2020-11-24Hazardous operations 240600Z to 241000Z nov in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 3613/20 · Exercises2020-11-21 → 2020-11-24Hazardous operations 240600Z to 241000Z nov in area bound by 38-50N 025-00E, 38-30N 025-00E, 38-30N 025-45E,…
- HYDROLANT 3608/20 · Surveys2020-11-20 → 2020-11-23Underwater operations by M/V ievoli ivory: a. in progress until 20 nov in 35-21.10N 025-09.54E
- HYDROLANT 3606/20 · Exercises2020-11-20 → 2020-11-28Hazardous operations 0500Z to sunset 23 thru 27 nov in area bound by 35-36N 024-07E, 36-18N 024-07E, 36-18N…
- HYDROLANT 3585/20 · Exercises2020-11-18 → 2020-11-20Hazardous operations 0500Z to 1500Z daily 19 and 20 nov in area bound by 35-36N 024-07E, 36-18N 024-07E,…
- HYDROLANT 3578/20 · Surveys2020-11-18 → 2020-11-20Underwater operations by M/V ievoli ivory: a. in progress until 19 nov in 35-21.10N 025-09.54E
- HYDROLANT 3577/20 · Cable ops2020-11-18 → 2020-11-21Cable operations in progress until further notice by cableship giulo verne along trackline joining 36-22.3N…
- HYDROLANT 3563/20 · Surveys2020-11-17 → 2020-11-18Survey operations by M/V ievoli ivory: a. in progress along trackline joining 35-51.77N 024-39.95E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.