Surveys

Survey operations are in progress in the North Sea off Norway, with vessel Amazon Conqueror towing eight 1609-meter cables; two-mile berth requested.

North Sea · HYDROLANT 1477/26

What this record establishes

Cancelled notice · 2026-08-15 15:46Z

A later message explicitly cancels this notice. Cancellation ends the notice; the later message must be checked for any statement about recovery or continuing danger.

Source and dates
NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-31 13:53Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-23 11:02Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
North 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 North Sea →

issued
2026-07-31 13:53Z
status
Cancelled notice
sea
North Sea
position
58.706, 1.721
vessel
M/V AMAZON CONQUEROR · 37 messages
nearest port
Haugesund · 117 nm
source
NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z

Original warning text

NORTH SEA.
NORWAY.
SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER
NOTICE BY M/V AMAZON CONQUEROR TOWING
EIGHT 1609 METER LONG CABLES
IN AREA BOUND BY
58-52.30N 001-35.90E, 58-51.00N 001-55.40E,
58-32.40N 001-50.60E, 58-33.80N 001-31.00E.
TWO MILE BERTH REQUESTED.

Reading this warning

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.
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

171 within 180 nm since 1999 · 6 in the last 12 months · 0 listed in force now

99
00
05
10
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 00:22Z; 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.