Survey operations 05 nov until further notice by M/V polarcus naila towing ten 5000 meter long cables in…
Gulf of Thailand · HYDROPAC 3803/17
What this record establishes
Archived notice · 2017-11-29 12:31Z
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 XI 712/17 041132Z NOV 17.. Issued 2017-11-04 11:38Z. 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 Thailand. 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 HYDROPAC 3803/17 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Gulf of Thailand →
- issued
- 2017-11-04 11:38Z
- status
- Archived notice
- authority
- NAVAREA XI 712/17 041132Z NOV 17.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Gulf of Thailand
- position
- 8.071, 101.880
- vessel
- M/V POLARCUS NAILA · 61 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF THAILAND. THAILAND. DNC 03. SURVEY OPERATIONS 05 NOV UNTIL FURTHER NOTICE BY M/V POLARCUS NAILA TOWING TEN 5000 METER LONG CABLES IN AREA BOUND BY 08-14-32N 101-42-22E, 08-08-18N 101-42-19E, 08-02-41N 101-45-51E, 08-01-40N 101-46-52E, 08-01-45N 101-34-57E, 07-56-20N 101-34-55E, 07-56-06N 102-07-32E, 08-01-31N 102-07-35E, 08-03-59N 102-05-37E, 08-12-04N 102-03-19E, 08-13-57N 101-57-55E, 08-14-27N 101-53-49E. WIDE 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
6 within 180 nm since 1999 · 1 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 31 dec by M/V pxgeo 2 towing eight five mile long cables in area bound…2026-08-06
- Survey operations in progress until 27 jul by M/V sw vespucci towing eight 3.5 mile long cables in area…2019-07-04
- Survey operations 09 may until further notice by M/V polarcus naila towing 12 9000 meter long cables in area…2017-05-08
- Survey operations in progress until 31 may by M/V ptsc researcher towing 1500 meter long cable and M/V ptsc…2017-03-15
- Survey operations in progress until 30 sep by M/V lorely along trackline joining 05-39.3N 100-04.4E,…1999-09-15
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
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-01 07:20Z; 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.