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 3562/20 · Cable ops2020-11-17 → 2020-11-18Cable operations in progress until further notice by cableship giulo verne along trackline joining 36-22.30N…
- HYDROLANT 3549/20 · Surveys2020-11-16 → 2020-11-20Underwater operations by M/V urbano monti: a. 16 and 17 nov along trackline joining 36-39.5N 025-57.7E,…
- HYDROLANT 3543/20 · Surveys2020-11-15 → 2020-11-16Underwater operations in progress until further notice by M/V normand pacific along trackline joining…
- HYDROLANT 3542/20 · Surveys2020-11-15 → 2020-11-20Underwater operations in progress until 19 nov by M/V aegaeo a. 15 nov in 39-53.48N 025-15.05E
- HYDROLANT 3538/20 · Surveys2020-11-14 → 2020-11-18Underwater operations by M/V ievoli ivory: a. 14 nov along trackline joining 36-08.77N 024-22.17E, 36-05.38N…
- HYDROLANT 3526/20 · Surveys2020-11-13 → 2020-11-16Underwater operations by M/V urbano monti: a. 12 and 13 nov along trackline joining 36-20.6N 025-28.1E,…
- HYDROLANT 3525/20 · Exercises2020-11-13 → 2020-11-16Hazardous operations 160700Z to 161500Z nov in area bound by 35-36N 024-07E, 36-18N 024-07E, 36-18N 024-47E,…
- HYDROLANT 3524/20 · Exercises2020-11-13 → 2020-11-13Hazardous operations 130600Z to 131000Z nov in area bound by 39-00.0N 025-18.0E, 38-54.0N 024-52.0E,…
- HYDROLANT 3523/20 · Exercises2020-11-13 → 2020-11-13Hazardous operations 130600Z to 131000Z nov in area bound by 36-25N 026-30E, 36-30N 026-58E, 36-13N 027-29E,…
- HYDROLANT 3522/20 · Surveys2020-11-13 → 2020-11-15Survey operations in progress until 18 nov by M/V aegaeo a. 13 nov in area bound by 40-36.42N 022-54.25E,…
- HYDROLANT 3507/20 · Surveys2020-11-12 → 2020-11-13Underwater operations by M/V urbano monti: a. 12 nov along trackline joining 36-20.6N 025-28.1E, 36-39.5N…
- HYDROLANT 3506/20 · Exercises2020-11-12 → 2020-11-12Hazardous operations 120600Z to 121000Z nov in area bound by 37-24.0N 026-00.0E, 37-31.0N 026-21.0E,…
- HYDROLANT 3505/20 · Exercises2020-11-12 → 2020-11-12Hazardous operations 120600Z to 121000Z nov in area bound by 40-26.45N 025-55.08E, 40-23.00N 025-54.00E,…
- HYDROLANT 3497/20 · Surveys2020-11-11 → 2020-11-14Underwater operations by M/V ievoli ivory: a. 11 nov in vicinity 36-38.82N 024-21.95E
- HYDROLANT 3472/20 · Exercises2020-11-10 → 2020-11-11Hazardous operations 110600Z to 111100Z nov in area bound by 40-30.00N 025-53.00E, 40-35.00N 024-58.00E,…
- HYDROLANT 3471/20 · Exercises2020-11-10 → 2020-11-11Hazardous operations 110600Z to 111000Z nov in area bound by 38-09.38N 026-12.48E, 38-00.00N 025-45.00E,…
- HYDROLANT 3467/20 · Cable ops2020-11-09 → 2020-11-17Cable operations in progress until further notice by cableship giulo verne along trackline joining 36-14.5N…
- HYDROLANT 3466/20 · Surveys2020-11-09 → 2020-11-11Underwater operations by M/V ievoli ivory: a. 09 nov along trackline joining 36-18.86N 024-19.84E, 36-19.08N…
- HYDROLANT 3452/20 · Surveys2020-11-08 → 2020-11-10Underwater operations by M/V ievoli ivory in progress until 09 nov along trackline joining 36-19.27N…
- HYDROLANT 3451/20 · Surveys2020-11-08 → 2020-11-11Underwater operations by M/V urbano monti in progress until 10 nov along trackline joining 36-20.60N…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.