Furuno FS-1575 Operator's Manual page 59

Send unable acknowledge automatically
If the frequency or mode specified by the sending station is one that you cannot use,
an unable acknowledge [CAN'T USE CH] is sent automatically. The [ACK SETTINGS]
menu is set to [AUTO (UNABLE)]. It takes about seven seconds to transmit the call.
Send able/unable acknowledge manually
When an individual call is received with the setting [MANUAL] on the [ACK SET-
TINGS] menu, the audio alarm sounds and a pop-up message appears on the screen
as below.
[SELECT AN ACK]
INDIVIDUAL MSG
FROM
COMM MODE :
COMM FREQ :
Press the CANCEL key to silence the audio alarm and erase the pop-up message.
There are three types of ACK transmission; able acknowledge, able to change fre-
quency and unable acknowledge. Follow the appropriate procedure on this and the
next page.
• How to send able acknowledge call
1. With [ACCEPT] selected, push the ENTER knob to send the able acknowledge
call.
[SENDING]
INDIV ABLE ACK
TO
COMM MODE :
COMM FREQ :
2. Communicate by radiotelephone or NBDP (see "Communication by NBDP ter-
minal unit" on page 5-9).
5. DSC GENERAL MESSAGE CALLING, RECEIVING
TX 2177.0/ RX 2177.00 kHz
ELAPSED TIME:
00
987654321
: CAPTAIN_2575
TELEPHONE
TX 2170.0 /RX 2170.0
INFO PRINT HOLD
ACCEPT UNABLE PROPOSE
TX 2177.0/ RX 2177.00 kHz
ELAPSED TIME:
00
987654321
: CAPTAIN_2575
TELEPHONE
TX 2170.0 /RX 2170.0
INFO PRINT
00 58
H M S
kHz
QUIT
00 31
H M S
kHz
5-7