|
gptkbp:instanceOf
|
radio communication system
|
|
gptkbp:antennaType
|
vertical whip antenna
|
|
gptkbp:channelNumber
|
over 50 channels
|
|
gptkbp:channelSpacing
|
25 kHz
|
|
gptkbp:component
|
gptkb:Global_Maritime_Distress_and_Safety_System_(GMDSS)
|
|
gptkbp:emergencyChannel
|
gptkb:Channel_16
|
|
gptkbp:emergencyFrequency
|
156.8 MHz
|
|
gptkbp:frequency
|
156 to 174 MHz
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
maritime VHF radio
|
|
gptkbp:inventedBy
|
20th century
|
|
gptkbp:modulatedBy
|
FM
|
|
gptkbp:powerOutput
|
1 to 25 watts
|
|
gptkbp:range
|
typically 20-30 nautical miles
|
|
gptkbp:regulates
|
gptkb:International_Telecommunication_Union
gptkb:Federal_Communications_Commission_(FCC)
national maritime authorities
|
|
gptkbp:requires
|
SOLAS vessels
GMDSS compliance
|
|
gptkbp:supports
|
gptkb:Digital_Selective_Calling_(DSC)
|
|
gptkbp:transmission
|
line-of-sight
|
|
gptkbp:usedBy
|
gptkb:aircraft
commercial vessels
recreational boats
harbor authorities
|
|
gptkbp:usedFor
|
port operations
search and rescue coordination
navigational safety
ship-to-shore communication
routine communication
ship-to-ship communication
distress signaling
weather broadcasts
|
|
gptkbp:bfsParent
|
gptkb:AIS_base_station
|
|
gptkbp:bfsLayer
|
8
|