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 1443/20 · Exercises2020-04-27 → 2020-04-30Hazardous operations 290600Z to 290900Z and 300600Z to 300800Z apr in area bound by 37-00N 023-36E, 37-00N…
- HYDROLANT 1408/20 · Cable ops2020-04-24 → 2020-05-05Cable operations in progress by cableship maersk connector until further notice along trackline joining…
- HYDROLANT 1407/20 · Exercises2020-04-24 → 2020-05-09Hazardous operations 25 thru 30 apr and 04 thru 08 may in area bound by 35-23.00N 024-15.30E, 35-23.00N…
- HYDROLANT 1390/20 · Exercises2020-04-21 → 2020-05-01Hazardous operations 0500Z to 1600Z daily 24 and 27 thru 30 apr in area bound by 37-24.0N 026-00.0E,…
- HYDROLANT 1389/20 · Exercises2020-04-21 → 2020-05-01Hazardous operations 0500Z to 1600Z daily 24 and 27 thru 30 apr in area bound by 39-14N 024-40E, 39-20N…
- HYDROLANT 1385/20 · Exercises2020-04-21 → 2020-04-30Hazardous operations 0500Z to 1600Z daily 24 and 27 thru 30 apr in area bound by 40-35.0N 024-58.0E,…
- HYDROLANT 1323/20 · Exercises2020-04-14 → 2020-04-16Hazardous operations 160500Z to 160900Z apr in area bound by 40-30.00N 025-53.00E, 40-35.00N 024-58.00E,…
- HYDROLANT 1305/20 · Exercises2020-04-12 → 2020-04-14Hazardous operations 140500Z to 140900Z apr in area bound by 40-26.45N 025-55.08E, 40-23.00N 025-54.00E,…
- HYDROLANT 1303/20 · Exercises2020-04-12 → 2020-04-16Gunnery exercises 160901Z to 161030Z apr in area bound by 40-08.65N 024-59.10E, 40-08.65N 025-07.90E,…
- HYDROLANT 1298/20 · Exercises2020-04-11 → 2020-04-15Hazardous operations 0500Z to 0900Z daily 13 thru 15 apr in area bound by 37-24.0N 026-00.0E, 37-31.0N…
- HYDROLANT 1283/20 · Exercises2020-04-10 → 2020-04-19Hazardous operations 11 thru 18 apr in area bound by 40-44.2N 023-58.0E, 40-33.4N 023-53.0E, 40-39.4N…
- HYDROLANT 1255/20 · Exercises2020-04-07 → 2020-04-10Hazardous operations 100500Z to 100900Z apr in area bound by 39-00.0N 025-18.0E, 38-54.0N 024-52.0E,…
- HYDROLANT 1244/20 · Exercises2020-04-07 → 2020-04-09Hazardous operations 090500Z to 090900Z apr in area bound by 38-09.38N 026-12.48E 38-00.00N 025-45.00E,…
- HYDROLANT 1237/20 · Exercises2020-04-06 → 2020-04-08Hazardous operations 080500Z to 080900Z apr in area bound by 39-25.17N 025-55.03E, 39-00.00N 025-18.00E,…
- HYDROLANT 1216/20 · Exercises2020-04-04 → 2020-04-07Hazardous operations 070500Z to 070900Z apr in area bound by 40-26.45N 025-55.08E, 40-23.00N 025-54.00E,…
- HYDROLANT 1203/20 · Exercises2020-04-03 → 2020-04-08Gunnery exercises 080901Z to 081030Z apr in area bound by 39-30N 025-33E, 39-40N 025-33E, 39-40N 025-20E,…
- HYDROLANT 1182/20 · Exercises2020-04-02 → 2020-04-06Hazardous operations 060500Z to 060900Z apr in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 1174/20 · Exercises2020-04-01 → 2020-04-04Hazardous operations 031700Z to 040200Z apr in area bound by 37-50.0N 023-10.0E, 37-56.5N 023-10.0E,…
- HYDROLANT 1173/20 · Exercises2020-04-01 → 2020-04-03Torpedo exercises 021600Z to 030400Z apr in area bound by 36-55N 023-05E, 37-12N 023-05E, 37-12N 023-20E,…
- HYDROLANT 1161/20 · Exercises2020-03-31 → 2020-04-10Hazardous operations 0500Z to 0900Z daily 03 and 10 apr in area bound by 38-50.00N 025-00.00E, 38-30.00N…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.