Icebergs

North american ice service (nais) iceberg bulletin 210001Z apr

Labrador Sea · NAVAREA IV 433/23

What this record establishes

Archived notice · 2023-04-22 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 201937Z APR 23.. Issued 2023-04-20 19:44Z. 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 1344/222022-12-12 · Archived notice
  2. NAVAREA IV 1346/222022-12-13 · Archived notice
  3. NAVAREA IV 1350/222022-12-14 · Archived notice
  4. NAVAREA IV 1353/222022-12-15 · Archived notice
  5. NAVAREA IV 1360/222022-12-16 · Archived notice
  6. NAVAREA IV 1366/222022-12-17 · Archived notice
Compare all 213 notices, changes and original texts →

Current notices and reporting history in the Labrador Sea →

issued
2023-04-20 19:44Z
status
Archived notice
self-cancels
2023-04-22 00:01Z
authority
NAIS 0/23 201937Z APR 23.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Labrador Sea
position
54.924, -51.198
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 210001Z APR.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   47-13N 055-10W, 45-25N 053-15W,
   45-55N 049-10W, 48-00N 047-00W,
   51-25N 048-00W, 57-55N 054-55W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   57-55N 054-55W, 56-00N 050-25W,
   56-20N 048-40W, 57-20N 046-00W,
   58-05N 041-20W, 63-40N 037-30W,
   65-25N 029-15W.
4. WESTERN ICEBERG LIMIT ALONG TRACKLINE
   JOINING
   50-12N 061-20W, 48-00N 059-12W.
5. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 46-43N 060-21W, 47-04N 059-53W,
      47-28N 060-50W, 46-42N 062-30W,
      49-23N 064-20W, 49-16N 067-06W,
      50-05N 066-05W, 49-56N 060-14W,
      50-45N 057-49W, 48-33N 059-14W.
   B. 47-20N 052-44W, 47-21N 051-59W,
      50-05N 052-01W, 51-00N 052-51W,
      53-47N 052-17W, 55-33N 053-45W,
      57-01N 057-06W, 58-03N 058-26W,
      61-46N 059-51W, 63-22N 057-57W.
   C. 62-25N 040-53W, 59-16N 043-18W,
      58-57N 045-44W, 60-29N 050-38W,
      61-18N 050-44W, 61-22N 050-06W,
      60-23N 048-47W, 60-44N 047-26W.
6. MOST RECENT RECONNAISSANCE:
   INTERIOR ICEBERG FLIGHT 19 APR 22.
7. 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.
8. FOR MORE REPORTING INFORMATION OR TO
   DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
   GO TO WWW.NAVCEN.USCG.GOV/IIP.
9. CANCEL THIS MSG 220001Z APR 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

2218 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
24

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 01:15Z; 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.