Surveys
Survey operations in progress until 30 apr by M/V polarcus asima towing eight 6500 meter long cables in area…
Southwestern Indian Ocean · South Africa · HYDROPAC 777/19
What this record establishes
Archived notice · 2019-05-01 00:01Z
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 VII 75/19 081014Z MAR 19.. Issued 2019-03-08 10:14Z. 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
- Southwestern Indian Ocean · South Africa. 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
- 2019-03-08 10:14Z
- status
- Archived notice
- authority
- NAVAREA VII 75/19 081014Z MAR 19.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- vessel
- M/V POLARCUS ASIMA · 48 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTHWESTERN INDIAN OCEAN. SOUTH AFRICA. DNC 02. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 APR BY M/V POLARCUS ASIMA TOWING EIGHT 6500 METER LONG CABLES IN AREA BETWEEN 35-27.7S 35-49.4S AND 022-47.3E 023-40.0E SIX MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 726/19. 3. CANCEL THIS MSG 01 MAY 19.
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.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf 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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 01:58Z; 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.