Surveys

Survey operations in progress until 311830Z may by M/V ramform sovereign in area bound by 14-27.4N…

Andaman or Burma Sea · HYDROPAC 735/17

What this record establishes

Archived notice · 2017-04-07 12:33Z

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 VIII 165/17 012259Z MAR 17.. Issued 2017-03-01 23:18Z. 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
Andaman or Burma 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 Andaman or Burma Sea →

issued
2017-03-01 23:18Z
status
Archived notice
self-cancels
2017-05-31 19:30Z
authority
NAVAREA VIII 165/17 012259Z MAR 17.
NAVAREA
NAVAREA VIII · named as the source of this relay
sea
Andaman or Burma Sea
position
14.215, 95.104
vessel
M/V RAMFORM SOVEREIGN · 63 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ANDAMAN SEA.
DNC 03.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 311830Z MAY
   BY M/V RAMFORM SOVEREIGN IN AREA BOUND BY
   14-27.4N 095-16.3E, 14-19.7N 095-16.4E,
   14-19.7N 095-25.4E, 14-00.0N 095-25.7E,
   14-00.0N 094-49.0E, 14-27.3N 094-49.0E.
2. CANCEL HYDROPAC 27/17(71).
3. CANCEL THIS MSG 311930Z MAY 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.
Date-time group (DTG)
A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
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.
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.

All warning terms →

Collected reports in this area · survey operations

84 within 180 nm since 2012 · 1 in the last 12 months · 0 listed in force now

12
15
20
25
26

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 2026-10-02 00:43Z; 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.