Surveys

Survey operations in progress until further notice by n/v yang di zhi jiu hao towing equipment 8000 meters…

Arabian Sea · HYDROPAC 4171/19

What this record establishes

Archived notice · 2019-12-30 07:36Z

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 IX 430/19 161506Z DEC 19.. Issued 2019-12-16 16:38Z. 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
Arabian 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 Arabian Sea →

issued
2019-12-16 16:38Z
status
Archived notice
authority
NAVAREA IX 430/19 161506Z DEC 19.
NAVAREA
NAVAREA IX · named as the source of this relay
sea
Arabian Sea
position
23.322, 64.970
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ARABIAN SEA.
PAKISTAN.
DNC 03, DNC 10.
SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER
NOTICE BY N/V YANG DI ZHI JIU HAO TOWING
EQUIPMENT 8000 METERS IN LENGTH
IN AREA BOUND BY
22-25.10N 062-48.39E 21-51.80N 063-23.55E,
21-49.80N 064-38.40E 21-36.50N 064-52.10E,
24-10.50N 067-07.80E 25-12.70N 065-20.30E.
FIVE MILE 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.
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.

All warning terms →

Collected reports in this area · survey operations

26 within 180 nm since 2003 · 0 in the last 12 months · 0 listed in force now

03
05
10
15
20
23

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

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 05:05Z; 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.