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 3900/20 · Surveys2020-12-17 → 2020-12-18Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 37-16.97N 023-44.72E,…
- HYDROLANT 3891/20 · Surveys2020-12-16 → 2020-12-17Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 37-39.78N 023-29.37E,…
- HYDROLANT 3889/20 · Exercises2020-12-16 → 2020-12-18Hazardous operations 180700Z to 181300Z dec in area bound by 36-56N 023-29E, 36-42N 023-32E, 36-41N 023-48E,…
- HYDROLANT 3870/20 · Exercises2020-12-15 → 2020-12-16Hazardous operations 161500Z to 162100Z dec in area bound by 37-10N 023-00E, 37-10N 023-36E, 37-00N 023-36E,…
- HYDROLANT 3868/20 · Exercises2020-12-15 → 2020-12-17Hazardous operations 0600Z to 1400Z daily 16 and 17 dec in area bound by 36-40N 023-40E, 36-40N 024-10E,…
- HYDROLANT 3866/20 · Exercises2020-12-15 → 2020-12-15Gunnery exercises 151001Z to 151130Z dec in area bound by 40-08.65N 024-59.10E, 40-08.65N 025-07.90E,…
- HYDROLANT 3863/20 · Exercises2020-12-15 → 2020-12-17Hazardous operations 1800Z to 0400Z daily 15 and 16 dec in area bound by 36-55N 023-05E, 36-55N 023-37E,…
- HYDROLANT 3862/20 · Exercises2020-12-15 → 2020-12-15Hazardous operations 141500Z to 142100Z and 151600Z to 152100Z dec in area bound by 37-10N 023-00E, 37-10N…
- HYDROLANT 3861/20 · Exercises2020-12-15 → 2020-12-17Hazardous operations 0600Z to 1500Z daily 14 thru 17 dec in area bound by 36-56N 023-29E, 36-42N 023-32E,…
- HYDROLANT 3852/20 · Cable ops2020-12-14 → 2021-07-28Cable operations in progress until further notice by cableship normand pacific in 36-22.13N 023-05.25E
- HYDROLANT 3790/20 · Exercises2020-12-06 → 2020-12-07Hazardous operations: a. 070730Z to 070830Z dec in area within 20 miles of 34-25N 026-50E
- HYDROLANT 3733/20 · Exercises2020-11-30 → 2020-12-04Hazardous operations 040600Z to 041000Z dec in area bound by 39-25.17N 025-55.00E, 39-00.00N 025-18.00E,…
- HYDROLANT 3732/20 · Exercises2020-11-30 → 2020-12-03Hazardous operations 030600Z to 031000Z dec in area bound by 38-50N 025-00E, 38-30N 025-00E, 38-30N 025-45E,…
- HYDROLANT 3723/20 · Exercises2020-11-29 → 2020-12-01Hazardous operations 010600Z to 011100Z dec in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 3720/20 · Exercises2020-11-29 → 2020-12-01Hazardous operations 011300Z to 011600Z dec in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 3716/20 · Surveys2020-11-29 → 2020-12-15Underwater operations in progress until 29 dec by M/V urbano monti along trackline joining 36-50.1N…
- HYDROLANT 3709/20 · Surveys2020-11-28 → 2020-11-29Underwater operations by M/V urbano monti: a. in progress until 28 nov along trackline joining 36-38.00N…
- HYDROLANT 3697/20 · Surveys2020-11-27 → 2020-11-30Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 35-25.34N 025-12.95E,…
- HYDROLANT 3680/20 · Surveys2020-11-26 → 2020-11-28Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 35-25.34N 025-12.95E,…
- HYDROLANT 3679/20 · Surveys2020-11-26 → 2020-11-29Underwater operations by M/V urbano monti in progress until 28 nov along trackline joining 36-20.6N…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.