Survey operations in progress until 25 nov by M/V bgp challenger towing one 12000 meter long cable in area…
North Atlantic Ocean · HYDROLANT 3368/18
What this record establishes
Archived notice · 2018-11-21 15:46Z
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 II 427/18 291703Z OCT 18.. Issued 2018-10-29 17:17Z. 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
- North Atlantic Ocean. 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
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 2018-10-29 17:17Z
- status
- Archived notice
- authority
- NAVAREA II 427/18 291703Z OCT 18.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 20.376, -18.621
- vessel
- M/V BGP CHALLENGER · 82 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH ATLANTIC. DNC 01. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 25 NOV BY M/V BGP CHALLENGER TOWING ONE 12000 METER LONG CABLE IN AREA BOUND BY 20-59.9N 019-25.6W, 21-00.2N 017-49.3W, 19-45.5N 017-48.5W, 19-44.8N 019-25.4W. TEN MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 3164/18. 3. CANCEL THIS MSG 26 NOV 18.
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.
- 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.
- 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
16 within 180 nm since 2001 · 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 010000Z aug until further notice by M/V 7 waves in area bound by 23-53.00N 016-48.00W,…2023-07-27
- Survey operations in progress until 30 nov by M/V bgp pioneer towing seven mile long cable in area bound by…2021-09-10
- Survey operations 02 thru 24 dec by M/V fugro supporter along trackline joining 19-23.8N 019-59.2W, 20-36.3N…2020-11-28
- Survey operations in progress until further notice by M/V oceanic vega towing ten 8100 meter long cables in…2019-11-26
- Survey operations in progress until further notice by M/V oceanic vega towing ten 8100 meter long cables in…2019-11-25
- Survey operations in progress until 15 feb 20 by M/V oceanic vega towing ten 8100 meter long cables in area…2019-11-15
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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-02 06:26Z; 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.