index

HYDROARC warnings in force as of 201638Z jan 18: 4/18

HYDROARC 6/18

issued: 2018-01-20 16:41Z
status: cancelled 2018-01-26 18:39Z (archive)
cancels: HYDROARC 5/18
authority: SFH 201640Z JAN 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 201638Z JAN 18:
   4/18.
   322/17, 307/17, 306/17, 293/17, 288/17, 287/17,
   274/17, 267/17, 228/17, 189/17, 188/17, 139/17.
   205/16, 155/16.
   345/15, 343/15.
   269/14, 268/14, 131/14, 131/14.
   193/12, 112/12.
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 5/18.

Timeline

HYDROARC warnings in force as of 121328Z jan 18: 4/18cancels · 2018-01-12
HYDROARC warnings in force as of 121328Z jan 18: 4/18replaced · 2018-01-12
HYDROARC warnings in force as of 261838Z jan 18: 7/18, 4/18cancelled by · 2018-01-26

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

9 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.