Surveys

Survey operations are in progress until 31 December by vessel Island Frontier in the Gulf of America off Louisiana; wide berth requested.

Gulf of Mexico · NAVAREA IV 762/26

What this record establishes

Cancelled notice · 2026-08-22 23:50Z

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 2026-08-06 23:16Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-24 19:47Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered
Gulf of Mexico. 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 Gulf of Mexico →

issued
2026-08-06 23:16Z
status
Cancelled notice
self-cancels
2027-01-01 00:01Z
NAVAREA
NAVAREA IV
sea
Gulf of Mexico
position
27.410, -90.625
vessel
M/V ISLAND FRONTIER · 3 messages
nearest port
New Orleans · 155 nm
source
NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z

Original warning text

GULF OF AMERICA.
LOUISIANA.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 31 DEC
   BY M/V ISLAND FRONTIER IN AREA BOUND BY
   27-54.83N 092-06.05W, 27-52.85N 089-52.06W,
   26-24.29N 089-54.51W, 26-26.11N 089-54.51W.
   WIDE BERTH REQUESTED.
2. CANCEL NAVAREA IV 700/26.
3. CANCEL THIS MSG 010001Z JAN 27.

Reading this warning

Survey operations
A research or survey vessel is mapping the seabed or water column, often while towing equipment.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
NAVAREA
One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.
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.

All warning terms →

Collected reports in this area · survey operations

49 within 180 nm since 2002 · 3 in the last 12 months · 0 listed in force now

02
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

55 survey operations listed in force · see all

Record snapshot 2026-09-28 02:54Z; 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.