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DSC OPERATION

When the optional MA-500TR CLASS B AIS TRANSPON-

DER is connected to your transceiver, an individual DSC call

can be transmitted to a selected AIS target, without needing

to enter the target’s MMSI code. In this case, the call type is

automatically set to Routine.

See page 75 for connecting instructions.

To ensure correct operation of the DSC function, make

sure you correctly set the CH70 SQL LEVEL. (p. 64)

Step 1: Transponder’s operation

Select a desired AIS target on the plotter, target list or dan- q

ger list display.

 •Youcanalsogotothenextstepwheneverthedetailscreenof

the AIS target is displayed.

 •Makesurethetransceiverisinthenormaloperatingmode.Oth-

erwise, you cannot make an individual DSC call using the tran-

sponder.

Push [DSC] to display the voice channel selection screen, w

and then push [Y] or [Z] to select a desired voice chan-

nel*.

 •Voicechannelsarealreadypresetintothetransponderinrecom-

mended order.

* When a coast station is selected in step q, a voice channel will

be speciﬁed by the coast station, therefore you cannot change

the channel. The transponder will display “Voice Channel is

speciﬁed by the Base station,” in this case.

Push [DSC] to make an individual DSC call to the AIS tar- e

get.

 •IfChannel70isbusy,thetransceiverstandsbyuntilthechannel

becomes clear.

 •Ifthetransceivercannotmakethecall,thetransponderwilldis-

play “DSC Transmission FAILED.”

Making an Individual call using an AIS transponder ■

Transponder’s display Transceiver’s display

Icom IC-M323 User Manual

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