Surveys
Survey operations in progress until 30 apr by M/V ramform atlas towing 12 seven mile long cables in area…
Gulf of Guinea · Ghana · HYDROLANT 1091/18
What this record establishes
Archived notice · 2018-04-23 04:21Z
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 153/18 030349Z APR 18.. Issued 2018-04-03 04:20Z. 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
- Gulf of Guinea · Ghana. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Survey operations in progress until 30 apr by M/V ramform atlas towing 12 seven mile long cables in area…cancelled by this notice
- Cancel HYDROLANT 1091/18 and this msg, operations completedlater cancellation notice
- issued
- 2018-04-03 04:20Z
- status
- Archived notice
- authority
- NAVAREA II 153/18 030349Z APR 18.
- NAVAREA
- NAVAREA II · named as the source of this relay
- vessel
- M/V RAMFORM ATLAS · 76 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. GHANA. DNC 01. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 APR BY M/V RAMFORM ATLAS TOWING 12 SEVEN MILE LONG CABLES IN AREA BETWEEN 04-02N 03-34N AND 003-10W 002-20W. EIGHT MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 382/18. 3. CANCEL THIS MSG 01 MAY 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.
- 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.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
50 survey operations listed in force · see all
Record snapshot 2026-09-24 22:20Z; 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.