Operating On Channel 13; Operating On Channel 67; Simplex/Duplex Channel Use - Standard Horizon HX400 Owner's Manual

3.6 OPERATING ON CHANNEL 13

Channel 13 is used at docks, bridges and for maneuvering in port. Messages
on this channel must concern navigation only, such as meeting and passing in
restricted waters. In emergencies and when approaching blind river bends,
High power is allowed. Pressing the
Low Power (1 Watt) to High (5 Watts). When you change from this channel
then return to it, low power will be automatically selected.

3.7 OPERATING ON CHANNEL 67

When channel 67 is used for navigational bridge-to-bridge traffic between ships,
High power may be used temporarily (in the USA band) by pressing the
key. When release the PTT switch, the transceiver will revert to low power.

3.8 SIMPLEX/DUPLEX CHANNEL USE

Refer to the VHF MARINE CHANNEL CHART (page 35) for instructions on
use of simplex and duplex channels.
All channels are factory-programmed in accordance with FCC, Industry
Canada, and International regulations. The mode of operation cannot
be altered from simplex to duplex or vice-versa. Simplex (ship to ship)
or duplex (marine operator) mode is automatically activated, depending
on the channel and whether the USA, Canadian or International operat-
ing band is selected.
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key will change the power output from
NOTE
HX400