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 494/21 · Exercises2021-02-20 → 2021-02-23Hazardous operations 230600Z to 231000Z feb in area bound by 38-50N 025-00E, 38-30N 025-00E, 38-30N 025-45E,…
- HYDROLANT 493/21 · Exercises2021-02-20 → 2021-02-25Hazardous operations 231300Z to 240400Z, 241300Z to 250400Z, 251300Z to 251700Z feb in area bound by 37-47N…
- HYDROLANT 449/21 · Surveys2021-02-16 → 2021-03-03Survey operations 18 feb thru 02 mar by M/V tcg cesme in area bound by 40-00.94N 024-52.91E, 39-40.83N…
- HYDROLANT 432/21 · Cable ops2021-02-14 → 2021-02-15Cable operations in progress until further notice by cableship normand pacific along trackline joining…
- HYDROLANT 427/21 · Surveys2021-02-13 → 2021-02-17Underwater operations by M/V ievoli ivory: a. 14 feb along trackline joining 37-44.9N 023-24.3E, 37-42.6N…
- HYDROLANT 410/21 · Exercises2021-02-11 → 2021-02-12Hazardous operations 120800Z to 121300Z feb in area bound by 36-56N 023-29E, 36-42N 023-32E, 36-41N 023-48E,…
- HYDROLANT 315/21 · Cable ops2021-02-03 → 2021-02-06Cable operations 03 feb until further notice by cableship normand pacific in 37-18.08N 023-43.64E
- HYDROLANT 279/21 · Cable ops2021-01-29 → 2021-01-31Cable operations in progress until further notice by M/V isaac newton along trackline joining 36-03.05N…
- HYDROLANT 258/21 · Exercises2021-01-28 → 2021-02-02Hazardous operations 021600Z to 022200Z feb in area bound by 37-47N 023-17E, 37-52N 023-22E, 37-50N 023-26E,…
- HYDROLANT 240/21 · Exercises2021-01-26 → 2021-01-28Hazardous operations 281300Z to 281800Z jan in area bound by 36-56N 023-29E, 36-42N 023-32E, 36-41N 023-48E,…
- HYDROLANT 170/21 · Exercises2021-01-18 → 2021-01-21Hazardous operations 210600Z to 211000Z jan in area bound by 37-24.0N 026-00.0E, 37-31.0N 026-21.0E,…
- HYDROLANT 163/21 · Exercises2021-01-18 → 2021-01-19Hazardous operations 190600Z to 191000Z jan in area bound by 39-25.17N 025-55.03E, 39-00.00N 025-18.00E,…
- HYDROLANT 155/21 · Exercises2021-01-16 → 2021-10-05Hazardous operations 16 jan thru 12 mar, 16 thru 24 mar, 26 mar thru 29 apr, 04 may thru 14 jun, 16 sep thru…
- HYDROLANT 154/21 · Exercises2021-01-16 → 2021-10-05Hazardous operations 16 jan thru 12 mar, 16 thru 24 mar, 26 mar thru 29 apr, 04 may thru 14 jun, 16 sep thru…
- HYDROLANT 153/21 · Exercises2021-01-16 → 2021-10-05Hazardous operations 16 jan thru 12 mar, 16 thru 24 mar, 26 mar thru 29 apr, 04 may thru 14 jun, 16 sep thru…
- HYDROLANT 145/21 · Exercises2021-01-15 → 2021-01-19Gunnery exercises 191001Z to 191130Z jan in area bound by 39-30N 025-33E, 39-40N 025-33E, 39-40N 025-20E,…
- HYDROLANT 136/21 · Exercises2021-01-14 → 2021-01-15Hazardous operations 150800Z to 151500Z jan in area bound by 36-56N 023-29E, 36-42N 023-32E, 36-41N 023-48E,…
- HYDROLANT 118/21 · Exercises2021-01-12 → 2021-12-31Hazardous operations 0500Z to 1500Z daily 01 jan thru 31 dec 21 except fridays, saturdays, sundays and…
- HYDROLANT 116/21 · Exercises2021-01-12 → 2022-01-01Hazardous operations sunrise to sunset daily 01 jan thru 31 dec 21 in area bound by 38-02N 024-52E, 38-16N…
- HYDROLANT 113/21 · Exercises2021-01-12 → 2021-02-25Hazardous operations 0600Z to 1300Z daily 13, 14, 18 thru 21, 25 thru 28 jan, 01 thru 04, 08 thru 11, 15…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.