Icebergs

300001Z mar iceberg limit 46-50N 054-05W, 45-45N 053-30W, 45-30N 046-20W, 47-00N 045-00W, 59-00N 055-30W

Gulf of St. Lawrence · NAVAREA IV 142/12

What this record establishes

Archived notice · 2012-03-31 00:01Z

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 292111Z MAR 12.. Issued 2012-03-29 21:55Z. 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 50.357, -57.256. 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 140/122012-03-27 · Archived notice
  2. NAVAREA IV 142/12 · this notice2012-03-29 · Archived notice
  3. NAVAREA IV 147/122012-03-31 · Archived notice
Compare all 3 notices, changes and original texts →

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

issued
2012-03-29 21:55Z
status
Archived notice
self-cancels
2012-03-31 00:01Z
authority
NAIS 292111Z MAR 12.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Gulf of St. Lawrence
position
50.357, -57.256
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTH AMERICAN ICE SERVICE (NAIS) ICEBERG BULLETIN.
1. 300001Z MAR ICEBERG LIMIT
   46-50N 054-05W, 45-45N 053-30W, 45-30N 046-20W,
   47-00N 045-00W, 59-00N 055-30W.
2. WESTERN ICEBERG LIMIT
   50-16N 059-58W, 48-53N 058-33W.
3. SEA ICE LIMIT:
   A. 46-50N 052-55W, 46-45N 047-45W, 48-00N 047-00W,
      50-30N 050-30W, 52-00N 050-30W, 56-30N 057-00W,
      58-00N 057-00W, 59-00N 056-30W, 60-00N 052-30W,
      61-00N 051-50W.
   B. 46-15N 060-00W, 47-30N 060-30W, 47-40N 061-40W,
      46-35N 063-30W, 48-45N 064-10W.
   C. 49-05N 066-35W, 49-20N 067-00W, 49-50N 066-30W,
      49-50N 064-50W, 49-25N 063-35W.
   D. 49-40N 062-40W, 49-45N 058-40W, 48-00N 059-30W.
      47-35N 059-20W.
4. REPORT POSITION AND TIME OF ANY ICEBERGS OR
   STATIONARY RADAR TARGETS THAT MAY LIKELY BE
   ICEBERGS TO THE NEAREST CANADIAN COAST GUARD
   MARINE COMMUNICATIONS AND TRAFFIC SERVICE STATION
   OR USING INMARSAT CODE 42.
5. CANCEL THIS MSG 310001Z MAR.

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.
Inmarsat-C / SafetyNET
The satellite system that carries NAVAREA warnings to ships at sea, and the terminal number rescue centres give for reports.
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

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

99
00
05
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 2026-10-01 20:46Z; 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.