index

HYDROARC warnings in force as of 191316Z oct 18: 277/18, 276/18, 275/18, 270/18, 268/18, 267/18, 257/18,…

HYDROARC 278/18

issued: 2018-10-19 13:27Z
status: cancelled 2018-10-26 16:09Z (archive)
cancels: HYDROARC 271/18
authority: SFH 191327Z OCT 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 191316Z OCT 18:
   277/18, 276/18, 275/18, 270/18, 268/18, 267/18,
   257/18, 256/18, 255/18, 254/18, 250/18, 241/18,
   235/18, 229/18, 225/18, 223/18, 212/18, 175/18,
   174/18, 170/18, 161/18, 160/18, 150/18, 147/18,
   146/18, 145/18.
   306/17, 293/17, 288/17, 274/17, 267/17, 228/17,
   189/17, 188/17, 139/17.
   205/16, 155/16.
   345/15.
   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 271/18.

Timeline

HYDROARC warnings in force as of 121257Z oct 18: 270/18, 268/18, 267/18, 266/18, 263/18, 261/18, 260/18,…cancels · 2018-10-12
HYDROARC warnings in force as of 121257Z oct 18: 270/18, 268/18, 267/18, 266/18, 263/18, 261/18, 260/18,…replaced · 2018-10-12
HYDROARC warnings in force as of 261607Z oct 18: 281/18, 280/18, 270/18, 268/18, 257/18, 256/18, 255/18,…cancelled by · 2018-10-26

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Worldwide now

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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.