Surveys

Survey operations 11 apr thru 02 jun by M/V elsa regent towing 10000 meter long cable in area bound by…

South China Sea · HYDROPAC 1211/19

What this record establishes

Archived notice · 2019-04-11 00:18Z

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) · HAIPHONG RADIO 101250Z APR 19.. Issued 2019-04-10 14:52Z. 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. 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 South China Sea →

issued
2019-04-10 14:52Z
status
Archived notice
authority
HAIPHONG RADIO 101250Z APR 19.
issued by
HAIPHONG RADIO
sea
South China Sea
position
11.994, 110.062
vessel
M/V ELSA REGENT · 12 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SOUTH CHINA SEA.
VIETNAM.
DNC 11.
1. SURVEY OPERATIONS 11 APR THRU 02 JUN BY
   M/V ELSA REGENT TOWING 10000 METER LONG CABLE
   IN AREA BOUND BY
   12-36.15N 109-31.10E, 11-59.08N 109-32.02E,
   11-24.08N 109-24.12E, 11-24.08N 110-38.00E,
   12-37.07N 110-37.03E.
   SEVEN MILE BERTH REQUESTED.
2. CANCEL THIS MSG 03 JUN 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.
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.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · survey operations

16 within 180 nm since 2016 · 0 in the last 12 months · 0 listed in force now

16
20

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-01 21:43Z; 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.