Icebergs

North american ice service (nais) iceberg bulletin 230001Z dec

Labrador Sea · NAVAREA IV 1492/23

What this record establishes

Archived notice · 2023-12-24 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 0/23 231348Z DEC 23.. Issued 2023-12-23 14:00Z. 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
Labrador Sea. The map shows the reported line or operation extent; it is not a vessel track. 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 1441/232023-12-13 · Archived notice
  2. NAVAREA IV 1450/232023-12-14 · Archived notice
  3. NAVAREA IV 1455/232023-12-15 · Archived notice
  4. NAVAREA IV 1460/232023-12-16 · Archived notice
  5. NAVAREA IV 1470/232023-12-17 · Archived notice
  6. NAVAREA IV 1473/232023-12-18 · Archived notice
Compare all 45 notices, changes and original texts →

Current notices and reporting history in the Labrador Sea →

issued
2023-12-23 14:00Z
status
Archived notice
self-cancels
2023-12-24 00:01Z
authority
NAIS 0/23 231348Z DEC 23.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Labrador Sea
position
57.187, -50.888
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. NORTH AMERICAN ICE SERVICE (NAIS)
   ICEBERG BULLETIN 230001Z DEC.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   52-40N 055-48W, 52-30N 050-00W,
   53-15N 048-45W, 54-15N 049-00W,
   58-30N 057-00W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   58-30N 057-00W, 61-00N 055-00W,
   58-50N 045-40W, 59-10N 041-10W,
   60-50N 035-28W, 63-50N 036-55W,
   65-00N 027-35W.
4. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 47-05N 064-52W, 48-27N 064-05W,
      48-45N 064-10W.
   B. 48-56N 067-11W, 50-01N 066-20W,
      49-35N 063-46W.
   C. 49-50N 063-28W, 50-05N 063-13W,
      49-59N 060-11W, 51-18N 057-46W,
      50-54N 057-22W, 49-08N 058-24W.
   D. 50-39N 056-07W, 51-00N 055-05W,
      53-45N 055-15W, 56-00N 059-45W,
      59-45N 062-45W, 60-03N 062-14W,
      61-15N 060-00W, 63-14N 057-53W.
   E. 62-25N 041-23W, 61-41N 041-11W,
      60-53N 042-22W, 60-53N 042-32W,
      60-58N 042-39W.
5. MOST RECENT RECONNAISSANCE:
   INTERIOR SATELLITE PASS 22 DEC 23.
6. REPORT POSITION AND TIME OF ANY ICEBERGS
   SEA ICE OR STATIONARY RADAR TARGETS THAT
   MAY LIKELY BE ICE TO THE NEAREST CANADIAN
   COAST GUARD MARINE COMMUNICATIONS AND
   TRAFFIC SERVICE STATION OR
   USING INMARSAT CODE 42.
7. FOR MORE REPORTING INFORMATION OR TO
   DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
   GO TO WWW.NAVCEN.USCG.GOV/IIP.
8. CANCEL THIS MSG 240001Z DEC 23.

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.
Track line joining
Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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

2144 within 180 nm since 2010 · 1 in the last 12 months · 0 listed in force now

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

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

Record snapshot 2026-10-03 05:52Z; 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.