Technical information
Table Of Contents
- TITLE PAGE
- TABLE OF CONTENTS
- INTRODUCTION
- SECTION I
- CHARACTERISTICS OF HF SSB
- ACRONYMS AND DEFINITIONS
- REFERENCES
- HF SSB COMMUNICATIONS
- FREQUENCY
- SKYWAVE PROPAGATION - WHICH FREQUENCY TO
- WHY SINGLE SIDEBAND IS IMPORTANT IN HF
- AMPLITUDE MODULATION (AM)
- SINGLE SIDEBAND OPERATION
- SINGLE SIDEBAND (SSB)
- SUPPRESSED CARRIER VS. REDUCED CARRIER
- SIMPLEX AND SEMI-DUPLEX OPERATION
- AUTOMATIC LINK ESTABLISHMENT (ALE)
- FUNCTIONS OF HF RADIO AUTOMATION
- HOW ALE ASSURES THAT THE BEST COMMUNICA-TIONS
- CHARACTERISTICS OF HF SSB
- SECTION II
- SECTION III
- SECTION IV
- SECTION V
- SECTION VI
- SECTION VII
- ITU MARITIME RADIOTELEPHONE STATIONS
- DESCRIPTION OF SERVICES
- AT&T HIGH SEAS RADIOTELEPHONE SERVICE
- AT & T COAST STATION COVERAGE MAP
- COAST STATION COVERAGE & INFORMATION
- AIRCRAFT REGISTRATION
- OPERATING PROCEDURES FOR USING THE HIGH SEAS RADIOTELEPHONE NETWORK
- AT&T HIGH SEAS COAST STATIONS
- MOBILE MARINE RADIO, INC.
- WORLDWIDE LISTING OF PUBLIC CORRESPONDENCE STATIONS
- MARITIME RADIOTELEPHONE CHANNEL DESIGNATIONS
- SECTION VIII
- SECTION IX
- SECTION X
- SECTION XI
- SECTION XII
- SECTION XIII
or home number or any other authorized phone number in the
U.S.
4. Credit Card Call - the caller indicates that charges will be billed to
an AT&T telephone credit card.
5. Name and Address - the caller indicates that the charges will be
billed to a name and address.
HIGH SEA RATE STRUCTURE
The High Seas rate for calls handled by any of the three AT&T High
Seas stations (WOM, WOO, KMI) is a flat rate for the first three min-
utes and a flat rate for each additional minute or fraction thereof.
There is a three minute minimum on all calls. Call the nearest High
Seas Station or the High Seas Product Manager for current rates.
The High Seas rate is a total cost and is not dependent on the aircraft
location. It applies to any call to any location in the mainland United
States, Canada, Mexico, Puerto Rico and the American Virgin
Islands. The flat charge will allow you to choose between High Seas
Stations without affecting the charge. For all calls to overseas points
the charge is the High Seas rate plus the lowest person-to-person
overseas rate in effect at the time of the call.
TRAFFIC LIST BROADCAST
The three AT&T Coast Stations regularly broadcast a traffic list indi-
cating those aircraft and ships for which calls are pending.
AT&T HIGH SEAS COAST STATIONS
A FEW VITAL FACTS
• Aircraft and coast stations must transmit and receive on their
assigned paired channels.
• “Crossband” operation is strictly forbidden.
• All High Seas Stations continuously monitor the aircraft’s transmit-
ting channels.
• Do not wait for a traffic list broadcasting, before making a call.
Demand Calling is encouraged.
No calls are accepted on a channel just before it is scheduled to carry
a traffic list or weather broadcast. However, when a call is in
progress, the broadcast is omitted on the busy channel AT&T HIGH
SEAS STATIONS
Services
7-6
KHF 950/990 Pilots Guide
Rev. 0
Dec/96