index

HYDROARC warnings in force as of 171149Z dec 21: 340/21, 339/21, 338/21, 337/21, 329/21, 299/21, 281/21,…

HYDROARC 341/21

issued: 2021-12-17 11:53Z
status: cancelled 2021-12-24 15:38Z (archive)
cancels: HYDROARC 336/21
authority: SFH 171152Z DEC 21.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 171149Z DEC 21:
   340/21, 339/21, 338/21, 337/21, 329/21, 299/21,
   281/21, 270/21, 257/21, 232/21, 208/21, 207/21,
   205/21, 203/21, 190/21, 176/21, 166/21.
   249/20, 245/20, 41/20.
2. THE COMPLETE TEXT OF ALL IN-FORCE HYDROARC
   BROADCAST WARNINGS ARE AVAILABLE ON THE NGA
   MARITIME SAFETY INFORMATION WEBSITE AT:
   msi.nga.mil/NavWarnings.
   ALTERNATIVELY, THESE MAY BE REQUESTED BY E-MAIL
   FROM NGA AT [email protected].
3. CANCEL HYDROARC 336/21.

Timeline

HYDROARC warnings in force as of 101451Z dec 21: 335/21, 333/21, 329/21, 321/21, 299/21, 281/21, 270/21,…cancels · 2021-12-10
HYDROARC warnings in force as of 101451Z dec 21: 335/21, 333/21, 329/21, 321/21, 299/21, 281/21, 270/21,…replaced · 2021-12-10
HYDROARC warnings in force as of 241534Z dec 21: 343/21, 342/21, 339/21, 329/21, 299/21, 281/21, 270/21,…cancelled by · 2021-12-24

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.