Surveys

Survey operations 130001Z mar to 162359Z apr by M/V miguel oliver along coastline between 44-39N 001-10W and…

Bay of Biscay · HYDROLANT 791/17

What this record establishes

Archived notice · 2017-04-17 00:59Z

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 II 84/17 101611Z MAR 17.. Issued 2017-03-10 16:17Z. 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
Bay of Biscay. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Bay of Biscay →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2017-03-13 00:01Z2017-04-16 23:59Z—839 h 58

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2017-03-10 16:17Z
status
Archived notice
self-cancels
2017-04-17 00:59Z
authority
NAVAREA II 84/17 101611Z MAR 17.
NAVAREA
NAVAREA II · named as the source of this relay
sea
Bay of Biscay
position
43.242, -5.017
vessel
M/V MIGUEL OLIVER · 8 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
BAY OF BISCAY.
DNC 08.
1. SURVEY OPERATIONS 130001Z MAR TO 162359Z APR
   BY M/V MIGUEL OLIVER ALONG COASTLINE BETWEEN
   44-39N 001-10W AND 41-50N 008-52W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 170059Z APR 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.
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

37 within 180 nm since 2000 · 0 in the last 12 months · 0 listed in force now

00
05
10
15
20
24

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 19:17Z; 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.