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 2757/20 · Exercises2020-09-08 → 2020-09-11Hazardous operations 0600Z to 1300Z daily 10 and 11 sep in area bound by 35-32N 024-28E, 35-32N 024-38E,…
- HYDROLANT 2744/20 · Cable ops2020-09-06 → 2020-10-07Cable operations 062000Z sep until further notice by M/V isaac newton in 35-42.63N 023-33.29E
- HYDROLANT 2729/20 · Exercises2020-09-04 → 2020-09-08Hazardous operations 1200Z to 1400Z daily 08 and 09 sep in area bound by 36-56N 023-29E, 36-42N 023-32E,…
- HYDROLANT 2674/20 · Exercises2020-08-30 → 2020-09-18Hazardous operations 0500Z to 1200Z daily 01 thru 03, 07 thru 10, 14 thru 17, 21 thru 24, 28 thru 30 sep,…
- HYDROLANT 2398/20 · Exercises2020-07-31 → 2020-08-31Hazardous operations 0500Z to 1200Z daily 03 thru 06, 10 thru 13, 17 thru 20, 24 thru 27, and 31 aug in area…
- HYDROLANT 2297/20 · Surveys2020-07-21 → 2020-08-15Survey operations in progress until 14 aug in area bound by 36-05.85N 023-42.48E, 35-50.23N 026-14.85E,…
- HYDROLANT 2289/20 · Exercises2020-07-21 → 2020-07-29Hazardous operations 0500Z to 1200Z daily 21 thru 23 and 27 thru 29 jul in area bound by 38-45N 025-21E,…
- HYDROLANT 2263/20 · Exercises2020-07-18 → 2020-07-30Hazardous operations 0500Z to 1200Z daily 20 thru 23 and 30 jul and 0500Z to 0900Z daily 27 thru 29 jul in…
- HYDROLANT 2209/20 · Exercises2020-07-13 → 2020-07-16Hazardous operations 1400Z to 2000Z daily 14 thru 16 jul in area within 1 mile of 37-46.2N 023-45.5E
- HYDROLANT 2152/20 · Exercises2020-07-06 → 2020-07-08Hazardous operations 080400Z to 081500Z jul in area bound by 37-58N 025-18E, 38-07N 025-48E, 37-43N 025-59E,…
- HYDROLANT 2125/20 · Exercises2020-07-03 → 2020-08-15Hazardous operations 05 jul thru 14 aug in area bound by 36-05.85N 023-42.48E, 35-50.23N 026-14.85E,…
- HYDROLANT 2104/20 · Exercises2020-07-01 → 2020-07-03Hazardous operations 0600Z to 0900Z daily 02 and 03 jul in area bound by 39-30.26N 025-02.45E, 39-28.49N…
- HYDROLANT 2082/20 · Exercises2020-06-29 → 2020-07-02Hazardous operations 0600Z to 1400Z daily 01 and 02 jul in area bound by 38-34N 025-27E, 38-34N 025-33E,…
- HYDROLANT 2043/20 · Surveys2020-06-25 → 2020-07-01Survey operations 262100Z jun until further notice by M/V philia in area bound by 40-13.51N 023-16.47E,…
- HYDROLANT 2025/20 · Surveys2020-06-23 → 2020-06-25Underwater operations 24 jun until further notice by M/V philia in area bound by 40-55.48N 024-24.72E,…
- HYDROLANT 1988/20 · Surveys2020-06-18 → 2020-06-24Underwater operations in progress until further notice by M/V filia: a. along trackline joining 39-24.6N…
- HYDROLANT 1971/20 · Surveys2020-06-16 → 2020-06-18Underwater operations in progress until 20 jun by M/V filia along tracklines joining: a. 39-24.6N 025-04.1E,…
- HYDROLANT 1962/20 · Exercises2020-06-16 → 2020-06-19Hazardous operations 17 and 18 jun in area bound by 35-31N 024-11E, 35-36N 024-07E, 35-46N 024-07E, 35-41N…
- HYDROLANT 1954/20 · Exercises2020-06-15 → 2020-06-17Hazardous operations 1301Z to 2100Z daily 16 and 17 jun in area bound by 37-47N 023-17E, 37-44N 023-22E,…
- HYDROLANT 1951/20 · Exercises2020-06-14 → 2020-06-16Hazardous operations 161000Z to 162000Z jun in area bound by 37-55N 025-27E, 38-00N 025-44E, 37-46N 025-51E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.