Operation
4-47
3
3
3
.
.
.
After the antenna is tuned, the distress
alert is sent.
The distress alerts are sent on all 6 distress
and safety frequencies.
4
4
4
.
.
.
The equipment stays in distress mode until
acknowledgement is received or the distress
alert cancelling procedure is complete.
Unless an acknowledgement is received or the
distress alert is cancelled manually, the
distress alert repeats automatically in a
variable interval every 3.5 to 4.5 minutes.
(The time until next sending is shown at Next.)
The distress alert can be sent manually while
waiting for acknowledgement by the
DISTRESS key operation mentioned above.
While waiting for the acknowledgement, the
radiotelephone communication is available.
Additionally, when focusing the frequencies as
shown at right, the distress and safety
frequency can be changed with the jog dial.
Pressing CANCEL key or ENT moves the focused screen and makes following options
available.
FRQ ......... Moves the cursor to the frequency section
Pause ...... Makes the distress mode pause.
POS ......... Opens the position input menu
CHNG ...... Changes the distress alert type (Multi/Single mode and the frequencies)
Cancel ..... Starts the distress alert cancelling procedure, which is needed to send the DSC
acknowledgement and to broadcast in the radiotelephone mode from the “own ship”.
Furthermore, if the POS/CHNG is edited, MEM icon is displayed to indicate that there are
some data stored temporarily until resending the distress alert.
5
5
5
.
.
.
When the acknowledgement is received, the
message is displayed as shown at the right.
The ALM lamp starts blinking, and the receiving
alert starts sounding.
The radiotelephone mode is set to the
distress/safety frequency of the band on which
the acknowledgement is received and antenna
tuning is done immediately.
Press the CANCEL key or ENT to silence the
alert, then call for help with the handset.
Normally, the responding station calls on the
radiotelephone. Then reply to the receipt as
follows.
Say, "MAYDAY".
Say, "This is".
Own ship's MMSI and call sign, position, nature of distress, and rescue requests
RxID :1 2 3 4 5 6789| OWN D - ACK |2 MHz
DIST acknowledged (00 .2min )
Tx :2|4|6|8|12|16/ U n d e s i g n a t e d / TEL
89 ﾟ 59 . 0123 'N 179 ﾟ 59 . 6789 ' E @ 23 :59
Press CANCEL to silence alarm.
TEL
ID 431001234 23:59(UTC)
Pos 89ﾟ59.0123'N
179ﾟ59.6789'E@23:59 (EXT)
S
IG
RX
2182.00
kHz
TX
2182.00
kHz
W
KR
2
4
6
8
12
16
A
DST ALT
G
PS
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