index

HYDROARC warnings in force as of 281038Z jul 17: 174/17, 173/17, 172/17, 170/17, 169/17, 168/17, 165/17,…

HYDROARC 175/17

issued: 2017-07-28 10:39Z
status: cancelled 2017-08-04 10:45Z (archive)
cancels: HYDROARC 159/17
authority: SFHGA 281037Z JUL 17.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROARC WARNINGS IN FORCE AS OF 281038Z JUL 17:
   174/17, 173/17, 172/17, 170/17, 169/17, 168/17,
   165/17, 164/17, 163/17, 158/17, 156/17, 154/17,
   152/17, 151/17, 150/17, 148/17, 143/17, 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 159/17.

Timeline

HYDROARC warnings in force as of 211611Z jul 17: 158/17, 157/17, 156/17, 154/17, 152/17, 151/17, 150/17,…cancels · 2017-07-21
HYDROARC warnings in force as of 211611Z jul 17: 158/17, 157/17, 156/17, 154/17, 152/17, 151/17, 150/17,…replaced · 2017-07-21
HYDROARC warnings in force as of 041045Z aug 17: 186/17, 183/17, 182/17, 180/17, 179/17, 170/17, 169/17,…cancelled by · 2017-08-04

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.