index

HYDROARC warnings in force as of 041045Z aug 17: 186/17, 183/17, 182/17, 180/17, 179/17, 170/17, 169/17,…

HYDROARC 187/17

issued
2017-08-04 10:45Z
status
cancelled 2017-08-11 16:58Z (archive)
cancels
HYDROARC 143/17HYDROARC 175/17
authority
SFHGA 041045Z AUG 17.
source
nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 041045Z AUG 17:
   186/17, 183/17, 182/17, 180/17, 179/17, 170/17,
   169/17, 164/17, 163/17, 156/17, 152/17, 151/17,
   150/17, 148/17,140/17, 139/17, 138/17, 132/17,
   124/17, 123/17, 121/17, 119/17, 104/17, 97/17,
   81/17, 72/17, 59/17, 57/17, 44/17.
   222/16, 221/16, 220/16, 205/16, 155/16.
   345/15, 343/15, 320/15, 248/15.
   269/14, 268/14, 131/14.
   220/12, 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 143/17, 175/17.

Timeline

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.