Surveys
Survey operations in progress until further notice by M/V pgs apollo towing ten 8100 meter long cables in…
South China Sea · Taiwan-southwest Coast · HYDROPAC 2340/17
What this record establishes
Archived notice · 2017-07-13 09:07Z
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 440/17 051823Z JUL 17.. Issued 2017-07-05 18:24Z. 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
- South China Sea · Taiwan-southwest Coast. 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
- issued
- 2017-07-05 18:24Z
- status
- Archived notice
- authority
- NAVAREA XI 440/17 051823Z JUL 17.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- vessel
- M/V PGS APOLLO · 81 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH CHINA SEA. TAIWAN-SOUTHWEST COAST. DNC 23. 1. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V PGS APOLLO TOWING TEN 8100 METER LONG CABLES IN AREA BETWEEN 22-02.0N 21-41.2N AND 119-36.3E 120-19.0E. WIDE BERTH REQUESTED. 2. CANCEL HYDROPAC 2324/17.
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.
- 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.
- 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.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 04:25Z; 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.