JRC JHS-770S Instruction Manual page 24

It is used, for example, to confirm whether a ship
is existing within radio range when a coast station
requests navigational information to the ship.
PSTN（Public Switched Telephone Network）
General fixed landline telephone network.
Reason
Message code indicating reason for negative
acknowledgement response.
・ No reason ............. No reason
・ Congestion ............ Maritime information
exchange center congested
・ Busy ...................... Busy
・ Queue ................... Queued
・ Barred ................... Station barred
・ No operator ........... No operator
・ Temp no oper ........ Temporarily no operator
・ EQP disabled ........ Equipment disabled
・ Unable channel ..... Indicated channel cannot
be used
・ Unable mode... ..... Indicated mode cannot be
used
Subject
Message code clarifying communication contents
when sending an urgency call to all ships.
When sailing dangerous waters, such as political
instability, these call messages with the following
information are used.
・ Neutral ship ........... In accordance with ITU
resolution 18 (Mob-83),
inform all ships that own
ship is of neutral nationality.
・ Medical TRNSP .... Inform all ships that own
ship is performing medical
transportation, and is
protected under the 1949
Geneva Convention.
xxii
Type
Main contents of call message.
st
Normally, the 1 telecommand will be indicated,
but for a distress related call, it may also take into
account the Format and the EOS. Displayed
when message is received, as well as in LOG.
・ All modes RT ......... All F3E/G3E
radiotelephones
・ Duplex RT .............. Duplex F3E/G3E
radiotelephones
・ Polling .................... Polling
・ Data ....................... Data transmission
・ Position RQ ........... Ship position request
・ Ship position .......... Ship position notification
・ Test ........................ Safety test call
・ Unable to comply .... Negative acknowledgement
・ Distress.................. Distress message
・ Distress ACK ......... Acknowledgement of
distress message
・ Distress relay ......... Distress relay message
・ Dist-relay ACK ....... Acknowledgement of
distress relay message
・ Drobose ................. Distress relay message on
behalf of someone else
Work CH
Message code indicating a work channel to
communicate using radiotelephone.