WWV, WWVH HF VOICE (Time Tick)

WWV (Fort Collins, CO) 2.5, 5, 10, 15, 20 MHZ (AM)
8 Minutes past the hour	Atlantic highseas warnings
9 Minutes past the hour	Atlantic highseas warnings
10 Minutes past the hour	Pacific highseas warnings

WWVH (Hawaii) 2.5, 5, 10, 15 MHZ (AM)
48-51 Minutes past the hour	Pacific highseas warnings

The National Institute of Standards and Technology (NIST), broadcasts a time and frequency service from stations WWV in Fort Collins, CO and WWVH in Kauai, Hawaii., known to mariners as the "Time Tick", used as an aid in celestial navigation. Included in these are hourly voice broadcasts of current high seas storm warnings for the Atlantic, Pacific and Gulf of Mexico provided by the National Weather Service.The difference between the two stations is that WWV uses a male announcer for announcement of time, while WWVH uses a female announcer.

If you need more information on WWV, WWVH and time signals worldwide, look in NGA Publication 117 "Radio Navigational Aids"