Hazardous operation 030600Z to 031500Z mar in area bound by 37-29.32N 026-56.49E, 37-29.20N 026-58.46E,…
Aegean Sea · HYDROLANT 811/20
What this record establishes
Archived notice · 2020-03-03 16:00Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · GREEK NAVTEX IRAKLEIO 134/20 021601Z MAR 20.. Issued 2020-03-02 18:02Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Aegean Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2020-03-03 06:00Z | 2020-03-03 15:00Z | — | 9 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2020-03-02 18:02Z
- status
- Archived notice
- self-cancels
- 2020-03-03 16:00Z
- authority
- GREEK NAVTEX IRAKLEIO 134/20 021601Z MAR 20.
- issued by
- GREEK NAVTEX IRAKLEIO
- sea
- Aegean Sea
- position
- 37.478, 26.958
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AEGEAN SEA. DNC 09. 1. HAZARDOUS OPERATION 030600Z TO 031500Z MAR IN AREA BOUND BY 37-29.32N 026-56.49E, 37-29.20N 026-58.46E, 37-28.09N 026-58.46E, 37-28.11N 026-56.47E. 2. CANCEL THIS MSG 031600Z MAR 20.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · other warnings
9 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Hazardous exercises 250001Z to 250200Z feb in area bound by 36-05.00N 028-44.00E, 36-02.40N 029-20.60E,…2020-02-21
- Hazardous operation 070600Z to 071000Z nov in area bound by 36-05.00N 028-44.00E, 36-02.14N 029-20.21E,…2019-11-05
- Hazardous exercises 071000z to 071300 nov in area bound by 36-05.00N 028-44.00E, 36-02.40N 029-20.60E,…2019-11-04
- Hazardous operation 040600Z to 041000Z nov in area bound by 39-00.0N 025-18.0E, 38-54.0N 024-52.0E, 39-14.0N…2019-11-02
- Vessel requesting assistance in 37-57.4N 026-40.5E2018-04-02
- Geophysical operations 06 jun until further notice by M/V sentinel vicinity of trackline joining 37-58.0N…2001-06-02
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
Worldwide in the collected sources
23 other warnings listed in force · see all
Record snapshot 2026-10-01 18:22Z; source collection times vary.
Other
Everything the classifier did not place elsewhere. All current other warnings →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.