World-Wide Navigational Warning Service

NAVAREA IV

Coordinated by United States (National Geospatial-Intelligence Agency (NGA)); covers the western North Atlantic: North America's east coast, the Gulf of Mexico and the Caribbean.

NAVAREA IV is one of the two areas the United States coordinates. It covers the Atlantic coast of North America, the Gulf of Mexico and the Caribbean, out into the western Atlantic. Rocket launches from Florida, International Ice Patrol iceberg bulletins, U.S. Coast Guard search-and-rescue broadcasts and Caribbean aids-to-navigation notices are its most characteristic messages.

Because NGA publishes a complete archive of its own series, NAVAREA IV is one of the best-covered areas here: the historical archive to 2024 and live collection since August 2026.

own list read
NGA navigational warnings, NGA warning broadcasts
attributed by
own series 19,360 · named in an NGA relay 7

What the archive shows

19,367 warnings in this archive are attributed to NAVAREA IV, issued from 1977-10-04 to 2026-09-23. 106 of them are in force in the latest lists we collected.

19,360 come from the area's own series and 7 are NGA relays that name NAVAREA IV as their source.

Icebergs accounts for 4,761 of 19,367 recorded messages (25%), the largest warning type group in this selection.

The stations and services named as originators most often are NAIS (4,512), EASTERN RANGE (1,093), MEXICO IV (673) and COGARD NAVCEN DGPS (663), among 1220 in all.

The largest yearly count is 2023, with 1,468 warnings. Collection is incomplete between 2024-05 and 2026-08-17, so those years are not comparable.

They reached this archive through NAVAREA IV (19,360), HYDROLANT (5) and HYDROPAC (2).

Attributed warnings by year of issue

'77
'78
'79
'80
'81
'82
'83
'84
'85
'86
'87
'88
'89
'90
'91
'92
'93
'94
'95
'96
'97
'98
'99
'00
'01
'02
'03
'04
'05
'06
'07
'08
'09
'10
'11
'12
'13
'14
'15
'16
'17
'18
'19
'20
'21
'22
'23
'24
'25
'26

By month of issue, all years

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Warning types

Originating stations and services · 1220

The authority recorded with each message: the range, rescue centre, coast radio station or national service that issued it.

Where they lie · 27 sea areas

Newest in force · 106

  1. NAVAREA IV 902/26 · Nav aids · Caribbean Sea2026-09-18
    Pointe du vieux fort light 15-56.90N 061-42.46W
  2. NAVAREA IV 901/26 · Other · Caribbean Sea2026-09-18
    Ilet du gosier light 16-11.90N 061-29.44W at reduced intensity
  3. NAVAREA IV 898/26 · Surveys · Caribbean Sea2026-09-17
    NAVAREA IV mobile offshore drilling units positions at 171600Z sep: a. agosto 12 19-23.0N 092-03.1W
  4. NAVAREA IV 832/26 · Surveys · North Atlantic Ocean2026-08-27
    Trinidad and tobago
  5. NAVAREA IV 831/26 · Surveys · North Atlantic Ocean2026-08-13
    Survey operations 01 sep thru 20 nov 26 by M/V hos ridgewind in area bound by 07-44.74N 056-13.99W,…
  6. NAVAREA IV 709/26 · Wrecks · North Atlantic Ocean2026-07-21
    M/V barima sank in 07-28.23N 058-23.40W

In force the longest

  1. NAVAREA IV 144/21 · Nav aids · Caribbean Sea2021-02-16 · MEXICO IV
    Puerto morelos light 20-50.2N 086-55.0W unreliable
  2. NAVAREA IV 277/21 · Nav aids · Gulf of Mexico2021-04-02 · MEXICO IV
    Tonala light 18-12-45N 094-08-00W unlit
  3. NAVAREA IV 278/21 · Nav aids · Gulf of Mexico2021-04-02 · MEXICO IV
    Roca partida light 18-42-17N 095-11-18W unlit

Most recently issued

  1. NAVAREA IV 921/26 · Icebergs · Labrador Sea2026-09-22
    North american ice service (nais) iceberg bulletin 230001Z sep
  2. NAVAREA IV 917/26 · Nav aids · Caribbean Sea2026-09-21
    Trinidad and tobago
  3. NAVAREA IV 914/26 · Wrecks · Caribbean Sea2026-09-21
    Dangerous wreck in vicinity 14-17.21N 080-21.99W
  4. NAVAREA IV 902/26 · Nav aids · Caribbean Sea2026-09-18
    Pointe du vieux fort light 15-56.90N 061-42.46W
  5. NAVAREA IV 901/26 · Other · Caribbean Sea2026-09-18
    Ilet du gosier light 16-11.90N 061-29.44W at reduced intensity
  6. NAVAREA IV 922/26 · Missiles · Gulf of Mexico2026-09-17
    Hazardous operations, rocket launching 281215Z to 281414Z sep, alternate 1215Z to 1414Z daily 29 sep thru 04…
  7. NAVAREA IV 898/26 · Surveys · Caribbean Sea2026-09-17
    NAVAREA IV mobile offshore drilling units positions at 171600Z sep: a. agosto 12 19-23.0N 092-03.1W
  8. NAVAREA IV 896/26 · Icebergs · Labrador Sea2026-09-16
    North american ice service (nais) iceberg bulletin 170001Z sep

Neighbouring areas

All 21 NAVAREAs → · What a NAVAREA is →

Counts are warnings attributed to NAVAREA IV by their series or by the source an NGA relay names, recounted 2026-09-24; the area's full traffic is larger. Not for navigation — follow official NAVAREA broadcasts.

NAVAREA IV (United States) — navigational warnings and archive · seahazards