Worldwide Navigational Warning Service

The Worldwide Navigational Warning Service (WWNWS) is a global radio and satellite broadcast system for the dissemination of Maritime Safety Information that provides timely long-range and coastal warning messages, promoting the safety of life and property at sea, and Special Warnings that advise mariners of potential political or military hazards that may affect the safety of US shipping.

The broadcast desk is staffed 24 hours per day, 365 days per year. To submit information for inclusion in a Broadcast Warning message, contact the Worldwide Navigational Warning Service  broadcast desk at:

Phone: 571-557-5455
Toll-free: 800-362-6289
DSN: 547-5455
Internet e-mail: NavSafety@nga.mil
SIPRNet e-mail: navsafety@nscn.nga.smil.mil