index

HYDROARC warnings in force as of 281202Z dec 18: 333/18, 301/18, 299/18, 298/18, 297/18, 270/18, 256/18,…

HYDROARC 347/18

issued: 2018-12-28 12:05Z
status: cancelled 2019-01-04 13:40Z (archive)
cancels: HYDROARC 346/18
authority: SFH 281204Z DEC 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 281202Z DEC 18:
   333/18, 301/18, 299/18, 298/18, 297/18, 270/18,
   256/18, 255/18, 254/18, 229/18, 225/18, 147/18,
   146/18, 145/18.
   306/17, 288/17, 267/17, 228/17, 189/17, 188/17,
   139/17.
   205/16, 155/16.
   345/15.
   131/14, 131/14.
   193/12.
2. THE COMPLETE TEXT OF ALL IN-FORCE HYDROARC
   BROADCAST WARNINGS ARE AVAILABLE ON THE NGA
   MARITIME SAFETY INFORMATION WEBSITE AT:
   msi.nga.mil/NGAPortal/MSI.portal.
   ALTERNATIVELY, THESE MAY BE REQUESTED BY E-MAIL
   FROM NGA AT [email protected].
3. CANCEL HYDROARC 346/18.

Timeline

HYDROARC warnings in force as of 211111Z dec 18: 344/18, 343/18, 342/18, 333/18, 301/18, 299/18, 298/18,…cancels · 2018-12-21
HYDROARC warnings in force as of 211111Z dec 18: 344/18, 343/18, 342/18, 333/18, 301/18, 299/18, 298/18,…replaced · 2018-12-21
HYDROARC warnings in force as of 041336Z jan 19: 348/18, 333/18, 301/18, 299/18, 298/18, 297/18, 256/18,…cancelled by · 2019-01-04

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

8 index warnings in force

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.