Survey operations in progress until further notice by M/V polarcus adira towing 12 11000 meter long cables…
Norwegian Sea · HYDROLANT 1533/20
What this record establishes
Archived notice · 2020-09-05 18:55Z
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 I 60/20 050500Z MAY 20.. Issued 2020-05-05 06:14Z. 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
- Norwegian 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.
Related notices and cancellation links
- Cancel HYDROLANT 1533/20 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Norwegian Sea →
- issued
- 2020-05-05 06:14Z
- status
- Archived notice
- authority
- NAVAREA I 60/20 050500Z MAY 20.
- NAVAREA
- NAVAREA I · named as the source of this relay
- sea
- Norwegian Sea
- position
- 64.080, 2.836
- vessel
- M/V POLARCUS ADIRA · 68 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORWEGIAN SEA. DNC 20, DNC 21. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V POLARCUS ADIRA TOWING 12 11000 METER LONG CABLES IN AREA BOUND BY 64-45N 001-50E, 64-13N 004-50E, 63-25N 003-52E, 63-56N 000-50E. SEVEN MILE BERTH REQUESTED.
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.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
Collected reports in this area · survey operations
73 within 180 nm since 2008 · 3 in the last 12 months · 1 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 further notice by M/V amazon conqueror towing 12 10000 meter long cables…2026-08-28
- Survey operations in progress until further notice by M/V amazon conqueror towing 12 10000 meter long cables…2026-08-28
- Survey operations in progress until further notice by M/V ramform atlas towing 17 3600 meter long cables in…2026-07-03
- Survey operations in progress until further notice by M/V ramform hyperion towing 14 six mile long cables in…2024-04-26
- Survey operations in progress until further notice by M/V ramform victory towing nine six mile long cables…2023-08-17
- Survey operations 10 aug thru 01 sep by M/V oceanic vega towing cables in area bound by 66-29.40N…2023-08-09
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 09:57Z; 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.