Underwater operations 22 thru 31 dec by M/V edda flora with submersible along trackline joining 40-19.0N…
Adriatic Sea · HYDROLANT 3117/21
What this record establishes
Archived notice · 2022-01-01 00:01Z
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 885/21 211200Z DEC 21.. Issued 2021-12-21 09:10Z. 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
- Adriatic Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
- issued
- 2021-12-21 09:10Z
- status
- Archived notice
- authority
- NAVAREA III 885/21 211200Z DEC 21.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Adriatic Sea
- position
- 40.554, 18.875
- vessel
- M/V EDDA FLORA · 21 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
ADRIATIC SEA. ALBANIA. DNC 09. 1. UNDERWATER OPERATIONS 22 THRU 31 DEC BY M/V EDDA FLORA WITH SUBMERSIBLE ALONG TRACKLINE JOINING 40-19.0N 018-24.0E, 40-47.5N 019-21.0E. ONE MILE BERTH REQUESTED. 2. CANCEL THIS MSG 01 JAN 22.
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.
- 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
70 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.
- Underwater operations 28 aug thru 03 sep by M/V janus II in area bound by 40-58.27N 018-47.52E, 40-48.67N…2023-08-27
- Underwater operations 28 aug thru 03 sep in area bound by 40-58.27N 018-47.52E, 40-48.67N 018-24.72E,…2023-08-25
- Underwater operations in progress until 07 jan by M/V edda flora with submersible along trackline joining…2022-01-04
- Survey operations by M/V aigaio: a. 090900Z to 091400Z sep in 39-58.10N 019-23.83E2020-09-07
- Survey operations 07 nov thru 31 dec by M/V polar empress towing one five mile long cable in area bound by…2018-11-02
- Survey operations in progress until 18 aug by M/V song of the whale along trackline between 39-12.19N…2018-08-16
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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 19:01Z; 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.