index

HYDROARC warnings in force as of 131447Z apr 18: 49/18, 48/18, 47/18, 44/18, 38/18

HYDROARC 50/18

issued: 2018-04-13 14:48Z
status: cancelled 2018-04-20 10:47Z (archive)
cancels: HYDROARC 46/18
authority: SFH 131446Z APR 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 131447Z APR 18:
   49/18, 48/18, 47/18, 44/18, 38/18.
   322/17, 307/17, 306/17, 293/17, 288/17, 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 46/18.

Timeline

HYDROARC warnings in force as of 061111Z apr 18: 45/18, 44/18, 43/18, 38/18cancels · 2018-04-06
HYDROARC warnings in force as of 061111Z apr 18: 45/18, 44/18, 43/18, 38/18replaced · 2018-04-06
HYDROARC warnings in force as of 201047Z apr 18: 54/18, 53/18, 52/18, 51/18, 44/18, 38/18cancelled by · 2018-04-20

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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.