index

HYDROARC warnings in force as of 281137Z sep 18: 251/18, 250/18, 248/18, 241/18, 237/18, 235/18, 229/18,…

HYDROARC 253/18

issued: 2018-09-28 11:40Z
status: cancelled 2018-10-05 15:59Z (archive)
cancels: HYDROARC 244/18
authority: SFH 281140Z SEP 18.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 281137Z SEP 18:
   251/18, 250/18, 248/18, 241/18, 237/18, 235/18,
   229/18, 225/18, 223/18, 212/18, 177/18, 175/18,
   174/18, 170/18, 161/18, 160/18, 150/18, 147/18,
   146/18, 145/18.
   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 244/18.

Timeline

HYDROARC warnings in force as of 211130Z sep 18: 242/18, 241/18, 239/18, 237/18, 235/18, 232/18, 231/18,…cancels · 2018-09-21
HYDROARC warnings in force as of 211130Z sep 18: 242/18, 241/18, 239/18, 237/18, 235/18, 232/18, 231/18,…replaced · 2018-09-21
HYDROARC warnings in force as of 051557Z oct 18: 258/18, 257/18, 256/18, 255/18, 254/18, 251/18, 250/18,…cancelled by · 2018-10-05

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.