Icebergs

Possible iceberg reported in vicinity 49-36.3N 058-06.3W 261600Z apr

Gulf of St. Lawrence · NAVAREA IV 338/18

What this record establishes

Archived notice · 2018-04-29 17:21Z

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) · NOTSHIP N 530/18 261631Z APR 18.. Issued 2018-04-26 17:21Z. 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
Gulf of St. Lawrence. The parsed report position is 49.605, -58.105. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.

  1. NAVAREA IV 337/182018-04-26 · Archived notice
  2. NAVAREA IV 338/18 · this notice2018-04-26 · Archived notice
Compare all 2 notices, changes and original texts →

Current notices and reporting history in the Gulf of St. Lawrence →

issued
2018-04-26 17:21Z
status
Archived notice
self-cancels
2018-04-29 17:21Z
authority
NOTSHIP N 530/18 261631Z APR 18.
NAVAREA
NAVAREA IV
issued by
NOTSHIP N
sea
Gulf of St. Lawrence
position
49.605, -58.105
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF ST LAWRENCE.
CANADA.
1. POSSIBLE ICEBERG REPORTED IN VICINITY
   49-36.3N 058-06.3W 261600Z APR.
2. CANCEL NAVAREA IV 337/18.
3. CANCEL THIS MSG 291721Z APR 18.

Reading this warning

Icebergs and ice limits
Icebergs, smaller pieces of glacier ice and the published limit of known ice.
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.
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.
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.

All warning terms →

Collected reports in this area · iceberg & sea-ice bulletins

124 within 180 nm since 2010 · 0 in the last 12 months · 0 listed in force now

10
15
20
22

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

6 iceberg & sea-ice bulletins listed in force · see all

Record snapshot 2026-10-02 00:40Z; source collection times vary.

Icebergs

Iceberg limits and reported bergs — mostly the North American Ice Service (International Ice Patrol) bulletins in the North Atlantic. All current iceberg & sea-ice bulletins →

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.