Manual
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
Among the services provided by these stations are:
• Time Announcements
• Geophysical Alerts
• Omega Navigation System Status Reports
• GPS Status Announcement
• Marine Storm Warnings
TIME ANNOUNCEMENTS
Voice announcements are made from WWV and WWVH once every
minute. To avoid confusion, a man’s voice is used on WWV and a
woman’s voice on WWVH. The WWVH announcement occurs first -
at 15 seconds before the minute - while the WWV announcement
occurs at 7.5 seconds before the minute.
The time referred to in the announcements is “Coordinated Universal
Time” (UTC). It is coordinated through international agreements by
the International Time Bureau (BIH) so that time signals broadcast
from the other stations like WWV throughout the world will be in close
agreement. The specific hour and minute mentioned is actually the
time at the time zone centered around Greenwich, England, and may
Services
8-2
KHF 950/990 Pilots Guide
Rev. 0
Dec/96
PM PM PM PM PM
Midnight
AM AM AM AM AM AM AM AM AM AM AM Noon PM PM PM PM PM
105˚ 120˚ 135˚ 150˚ 165˚ 180˚ 165˚ 150˚ 135˚ 120˚ 105˚ 90˚ 75˚ 60˚ 45˚ 30˚ 15˚ 0˚
15˚
30˚ 45˚ 60˚ 75˚
105˚ 120˚ 135˚ 150˚ 165˚ 180˚ 165˚ 150˚ 135˚ 120˚ 105˚ 90˚ 75˚ 60˚ 45˚ 30˚ 15˚ 0˚
15˚
30˚ 45˚ 60˚ 75˚90˚ 90˚
40˚
60˚
20˚
0˚
20˚
40˚
60˚
80˚
40˚
60˚
20˚
0˚
20˚
40˚
60˚
80˚
ABCDEZNOPQSTUV
W
X
MY
LKIHGF R F
0+1+2+3+4-1-2-3-4-5
-7
-8-9-10
-11
-12+12+11+10+9+8+7+6
-6
+5
1 Day
+1 Day
NORTH PACIFIC OCEAN
SOUTH PACIFIC OCEAN
AUSTRALIA
ASIA
+6h
30m
+5h
30m
+6h
30m
+8h
+7h
30m
-3h
30m
NORTH
AMERICA
NORTH ATLANTIC
OCEAN
SOUTH ATLANTIC
OCEAN
-3
-3h
45m
-4
-3h
30m
44m
-3
ARCTIC OCEAN
INDIAN
OCEAN
+5h
30m
SOUTH
AMERICA
AFRICA
EUROPE
+3h
30m
+4h
30m