index

HYDROARC warnings in force as of 141345Z sep 18: 235/18, 232/18, 231/18, 230/18, 229/18, 225/18, 223/18,…

HYDROARC 236/18

issued: 2018-09-14 13:48Z
status: cancelled 2018-09-21 11:31Z (archive)
cancels: HYDROARC 226/18
authority: SFH 141345Z SEP 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 141345Z SEP 18:
   235/18, 232/18, 231/18, 230/18, 229/18, 225/18,
   223/18, 222/18, 220/18, 212/18, 177/18, 176/18,
   175/18, 174/18, 170/18, 167/18, 161/18, 160/18,
   150/18, 147/18, 146/18, 145/18, 142/18.
   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 226/18.

Timeline

HYDROARC warnings in force as of 071010Z sep 18: 225/18, 223/18, 222/18, 221/18, 220/18, 212/18, 177/18,…cancels · 2018-09-07
HYDROARC warnings in force as of 071010Z sep 18: 225/18, 223/18, 222/18, 221/18, 220/18, 212/18, 177/18,…replaced · 2018-09-07
HYDROARC warnings in force as of 211130Z sep 18: 242/18, 241/18, 239/18, 237/18, 235/18, 232/18, 231/18,…cancelled by · 2018-09-21

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