Underwater operations in progress until 29 dec by M/V urbano monti along trackline joining 36-50.1N…
Aegean Sea · HYDROLANT 3716/20
What this record establishes
Archived notice · 2020-12-15 14:25Z
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) · NAVAREA III 1619/20 290001Z NOV 20.. Issued 2020-11-29 00:36Z. 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 the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Underwater operations by M/V urbano monti: a. in progress until 28 nov along trackline joining 36-38.00N…cancelled by this notice
- Cancel HYDROLANT 3716/20 and this msglater cancellation notice
- issued
- 2020-11-29 00:36Z
- status
- Archived notice
- authority
- NAVAREA III 1619/20 290001Z NOV 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 36.621, 25.966
- vessel
- M/V URBANO MONTI · 26 messages
- 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. UNDERWATER OPERATIONS IN PROGRESS UNTIL 29 DEC BY M/V URBANO MONTI ALONG TRACKLINE JOINING 36-50.1N 026-29.6E, 36-39.5N 025-57.7E, 36-20.6N 025-28.1E. ONE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 3709/20. 3. CANCEL THIS MSG 30 DEC 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.
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
203 within 180 nm since 2000 · 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.
- Survey operations in progress until 14 jun by M/V tcg cesme in areas bound by a. 38-55.93N 025-24.97E,…2022-05-28
- Survey operations by M/V l'atalante: a. 15 apr in area bound by 33-53.47N 026-08.62E, 33-45.60N 026-09.25E,…2021-04-15
- Underwater operations 16 and 17 mar by M/V ievoli ivory along trackline joining 36-12.4N 024-19.9E, 36-01.0N…2021-03-15
- Underwater operations by M/V ievoli ivory: a. 11 mar along trackline joining 36-44.60N 024-08.00E, 36-15.10N…2021-03-10
- Underwater operations by M/V ievoli ivory: a. 08 mar along trackline joining 36-37.1N 024-14.1E 36-50.5N…2021-03-08
- Survey operations 18 feb thru 02 mar by M/V tcg cesme in area bound by 40-00.94N 024-52.91E, 39-40.83N…2021-02-16
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
56 survey operations listed in force · see all
Record snapshot 2026-10-03 19:02Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.