Icebergs

Icebergs reported at 171409Z apr in: a. 51-10.5N 057-24.7W

Gulf of St. Lawrence · NAVAREA IV 312/21

What this record establishes

Archived notice · 2021-04-20 15:08Z

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) · NAIS 171456Z APR 21.. Issued 2021-04-17 15:08Z. 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 51.193, -57.408. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

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

issued: 2021-04-17 15:08Z
status: Archived notice
self-cancels: 2021-04-20 15:08Z
authority: NAIS 171456Z APR 21.
NAVAREA: NAVAREA IV
issued by: NAIS
sea: Gulf of St. Lawrence
position: 51.193, -57.408
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. ICEBERGS REPORTED AT 171409Z APR IN:
   A. 51-10.5N 057-24.7W.
   B. 51-12.7N 057-24.3W.
2. CANCEL THIS MSG 201508Z APR 21.

Reading this warning

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

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

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.

Iceberg reported in 48-53.92N 059-52.83W2022-04-13
Iceberg reported in 50-51.6N 057-58.8W2022-04-08
North american ice service (nais) iceberg bulletin 090001Z jan2019-01-08
Possible iceberg reported in vicinity 49-36.3N 058-06.3W 261600Z apr2018-04-26
Iceberg reported in vicinity 49-36.3N 058-06.3W 261600Z apr2018-04-26
Iceberg sighted in 51-15.8N 055-16.2W2017-09-30

Month of issue in the collected archive

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 11:51Z; 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.