Underwater operations in progress until further notice by M/V ievoli ivory along trackline joining 36-35.14N…
Aegean Sea · HYDROLANT 3937/20
What this record establishes
Archived notice · 2020-12-24 01:59Z
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 1708/20 211307Z DEC 20.. Issued 2020-12-21 13:40Z. 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
- issued
- 2020-12-21 13:40Z
- status
- Archived notice
- authority
- NAVAREA III 1708/20 211307Z DEC 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 36.341, 24.303
- vessel
- M/V IEVOLI IVORY · 25 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 FURTHER NOTICE BY M/V IEVOLI IVORY ALONG TRACKLINE JOINING 36-35.14N 024-14.84E, 36-34.30N 024-14.97E, 36-20.32N 024-17.07E, 36-06.46N 024-23.73E. ONE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 3932/20.
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.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
Collected reports in this area · survey operations
195 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 12 apr by vessel M/V l atalante in area bound by 38-21.00N 024-00.00E,…2024-04-03
- 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 in progress until 15 jan by M/V sw cook towing one 12000 meter long cable in area bound by…2022-01-14
- Survey operations 12 jan thru 25 feb by M/V sw cook towing one 1200 meter long cable in area bound by…2022-01-11
- Survey operations by M/V arctic sunrise: a. 30 and 31 aug along trackline joining 35-17.9N 022-58.0E,…2021-08-31
- 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
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 2026-10-02 00:09Z; 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.