Survey operations 06 mar thru 30 apr by M/V ramform tethys towing 14 10000 meter long cables in area bound…
Mediterranean Sea - Eastern Basin · HYDROLANT 724/17
What this record establishes
Archived notice · 2017-04-20 00:15Z
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 134/17 041628Z MAR 17.. Issued 2017-03-04 16:34Z. 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
- Mediterranean Sea - Eastern Basin. 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 Mediterranean Sea - Eastern Basin →
- issued
- 2017-03-04 16:34Z
- status
- Archived notice
- authority
- NAVAREA III 134/17 041628Z MAR 17.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Eastern Basin
- position
- 33.000, 31.271
- vessel
- M/V RAMFORM TETHYS · 111 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN MEDITERRANEAN SEA. EGYPT. DNC 10. 1. SURVEY OPERATIONS 06 MAR THRU 30 APR BY M/V RAMFORM TETHYS TOWING 14 10000 METER LONG CABLES IN AREA BOUND BY 33-30N 030-40E, 33-08N 032-00E, 32-40N 032-00E, 32-40N 030-40E. EIGHT MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 538/17. 3. CANCEL THIS MSG 01 MAY 17.
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
202 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 270001Z dec until further notice by M/V ramform titan in area bound by 33-38.90N…2023-12-25
- Survey operations 14 oct until further notice by M/V ramform hyperion towing 12 11112 meter long cables in…2023-10-13
- Survey operations in progress until further notice by M/V ramform titan towing 12 six mile long cables in…2023-09-01
- Survey operations in progress until further notice by M/V ramform titan towing 12 six mile long cables in…2023-08-31
- Survey operations in progress until further notice by M/V ramform titan towing 12 six mile long cables in…2023-07-25
- Survey operations in progress until 21 jan by M/V nautical geo in area bound by 34-20.64N 031-26.41E,…2022-01-15
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
- Odas buoy 33-33.41N 031-55.09E reported missingNav aids · 46.6 nm
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-09-26 09:23Z; 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.