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 111/21 · Exercises2021-01-12 → 2021-12-31Hazardous operations in progress 0500Z to 1300Z daily until 31 dec except saturdays, sundays and holidays in…
- HYDROLANT 110/21 · Missiles2021-01-12 → 2022-01-01Gunnery and missile operations in progress 0530Z to sunset wednesday thru saturday until 31 dec: a. in area…
- HYDROLANT 104/21 · Exercises2021-01-12 → 2021-01-15Hazardous operations 1600Z to 0500Z daily 13 and 14 jan in area bound by 37-12N 023-05E, 37-12N 023-37E,…
- HYDROLANT 94/21 · Exercises2021-01-11 → 2021-01-13Hazardous operations 130600Z to 131000Z jan in area bound by 40-30.00N 025-53.00E, 40-35.00N 024-58.00E,…
- HYDROLANT 59/21 · Exercises2021-01-08 → 2021-01-13Hazardous operations 121600Z to 130200Z jan in area bound by 40-17.93N 024-42.97E, 40-08.93N 024-59.97E,…
- HYDROLANT 58/21 · Exercises2021-01-08 → 2021-01-12Hazardous operations 120600Z to 121000Z jan in area bound by 38-50N 025-00E, 38-30N 025-00E, 38-30N 025-45E,…
- HYDROLANT 56/21 · Exercises2021-01-08 → 2021-01-15Hazardous operations 0600Z to 1815Z daily 12 thru 15 jan in area bound by 35-36N 024-07E, 36-18N 024-07E,…
- HYDROLANT 43/21 · Exercises2021-01-07 → 2021-01-14Hazardous operations 0800Z to 1500Z daily 11 thru 14 jan in area bound by 36-56N 023-29E, 36-42N 023-32E…
- HYDROLANT 18/21 · Exercises2021-01-04 → 2021-01-07Hazardous operations 070600Z to 071000Z jan in area bound by 39-00.0N 025-18.0E, 38-54.0N 024-52.0E,…
- HYDROLANT 17/21 · Exercises2021-01-04 → 2021-02-25Hazardous operations 0500Z to 2159Z daily 05, 07, 12, 14, 19, 21, 26 and 28 jan and 02, 04, 09, 11, 16, 18,…
- HYDROLANT 3977/20 · Exercises2020-12-25 → 2020-12-28Hazardous operations 280600Z to 281000Z dec in area bound by 38-50N 025-00E, 38-30N 025-00E, 38-30N 025-45E,…
- HYDROLANT 3976/20 · Exercises2020-12-25 → 2020-12-29Hazardous operations 290600Z to 291000Z dec in area bound by 39-00.0N 025-18.0E, 38-54.0N 024-52.0E,…
- HYDROLANT 3962/20 · Surveys2020-12-24 → 2020-12-25Underwater operations in progress until further notice by M/V ievoli ivory along trackline joining 36-28.30N…
- HYDROLANT 3961/20 · Cable ops2020-12-24 → 2020-12-26Cable operations by M/V urbano monti: a. 24 dec along trackline joining 35-55.3N 027-51.7E, 35-20.8N…
- HYDROLANT 3937/20 · Surveys2020-12-21 → 2020-12-24Underwater operations in progress until further notice by M/V ievoli ivory along trackline joining 36-35.14N…
- HYDROLANT 3932/20 · Surveys2020-12-21 → 2020-12-21Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 36-42.49N 024-10.27E,…
- HYDROLANT 3918/20 · Surveys2020-12-19 → 2020-12-22Survey operations 21 dec until further notice by M/V aigaio in: a. 38-01.05N 023-33.27E
- HYDROLANT 3915/20 · Cable ops2020-12-18 → 2020-12-21Cable operations in progress until further notice by M/V urbano monti along trackline joining 36-47.1N…
- HYDROLANT 3914/20 · Surveys2020-12-18 → 2020-12-21Underwater operations by M/V ievoli ivory: a. in progress along trackline joining 37-15.53N 023-46.57E…
- HYDROLANT 3901/20 · Cable ops2020-12-17 → 2020-12-18Cable operations in progress until 18 dec by M/V urbano monti along trackline joining 36-47.10N 026-59.2E,…
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.