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 770/20 · Exercises2020-03-01 → 2020-04-30Hazardous operations 030600Z to 031300Z, 040600Z to 041400Z, 050600Z to 051800Z, 1000Z to 1800Z daily 06…
- HYDROLANT 763/20 · Exercises2020-02-29 → 2020-03-05Hazardous operations 041000Z to 041200Z and 051000Z to 051100Z mar in area bound by 37-00N 023-36E, 37-00N…
- HYDROLANT 760/20 · Exercises2020-02-29 → 2020-04-30Hazardous operations 0500Z to 2159Z daily 03, 05, 10, 12, 17, 19, 24, 26, 31 mar, 02, 07, 09, 14, 16, 21,…
- HYDROLANT 759/20 · Exercises2020-02-29 → 2020-03-05Hazardous operations 050600Z to 051000Z mar in area bound by 39-00N 025-18E, 38-54N 024-52E, 39-14N 024-40E,…
- HYDROLANT 758/20 · Exercises2020-02-29 → 2020-03-04Hazardous operations 040600Z to 041000Z mar in area bound by 39-25.17N 025-55.03E, 39-00.00N 025-18.00E,…
- HYDROLANT 756/20 · Exercises2020-02-29 → 2020-03-04Hazardous operations 040600Z to 04100Z mar in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 750/20 · Exercises2020-02-29 → 2020-04-30Hazardous operations 0500Z to 2159Z daily 03, 05, 10, 12, 17, 19, 24, 26, 31 mar, 02, 07, 09, 14, 16, 21,…
- HYDROLANT 721/20 · Exercises2020-02-27 → 2020-03-03Hazardous operations 030600Z to 031000Z mar in area bound by 40-26.20N 025-55.08E, 40-23.00N 025-54.00E,…
- HYDROLANT 693/20 · Exercises2020-02-24 → 2020-02-27Torpedo exercises 251500Z to 260800Z, 261500Z to 270600Z feb in area bound by 36-55N 023-05E, 37-12N…
- HYDROLANT 691/20 · Exercises2020-02-24 → 2020-02-25Gunnery exercises 251100Z to 251200Z feb in area bound by 38-56N 025-25E, 39-04N 025-42E, 39-15N 025-38E,…
- HYDROLANT 686/20 · Exercises2020-02-24 → 2020-02-28Gunnery exercises 281001Z to 281100Z feb in area bound by 38-56N 025-25E, 39-04N 025-42E, 39-15N 025-38E,…
- HYDROLANT 653/20 · Exercises2020-02-21 → 2020-02-26Hazardous operations 1300Z to 1500Z daily 25 and 26 feb in area bound by 36-56N 023-29E, 36-42N 023-32E,…
- HYDROLANT 651/20 · Exercises2020-02-21 → 2020-02-27Hazardous operations 0600Z to 1330Z and 1530Z to 2000Z daily 24 thru 27 feb in area bound by 37-41.08N…
- HYDROLANT 643/20 · Exercises2020-02-20 → 2020-02-26Hazardous operations 252000Z to 260400Z feb in area bound by 38-44.93N 025-40.97E, 38-41.93N 026-18.97E,…
- HYDROLANT 597/20 · Exercises2020-02-18 → 2020-02-27Hazardous operations 0600Z to 1000Z daily 21 and 27 feb in area bound by 36-25N 026-30E, 36-30N 026-58E,…
- HYDROLANT 579/20 · Exercises2020-02-17 → 2020-02-20Hazardous operations 200600Z to 201000Z feb in area bound by 40-30N 025-53E, 40-35N 024-58E, 40-10N 024-25E,…
- HYDROLANT 571/20 · Exercises2020-02-17 → 2020-02-20Gunnery exercises 201001Z to 201100Z feb in area bound by 38-56N 025-25E, 39-04N 025-42E, 39-15N 025-38E,…
- HYDROLANT 570/20 · Exercises2020-02-17 → 2020-02-20Gunnery exercises 201001Z to 201130Z feb in area bound by 40-08.65N 024-59.10E, 40-08.65N 025-07.90E,…
- HYDROLANT 558/20 · Exercises2020-02-16 → 2020-02-18Hazardous operations 180800Z to 181630Z feb in area bound by 37-00N 023-36E, 37-00N 023-00E, 37-10N 023-00E,…
- HYDROLANT 551/20 · Exercises2020-02-15 → 2020-02-19Hazardous operations 181900Z to 190500Z feb in area bound by 36-56N 023-29E, 36-42N 023-32E, 36-41N 023-48E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.