Garmin VHF 720 - Manual (Page 29)

23
GETTING
STARTED
FIGURE 11
Transmit Display
Press and
Hold While
Transmitting
3. Wait until the channel you have selected is free of
communications. THIS IS AN FCC REQUIRE-
MENT!
NOTE: For communications over short distances,
press the H/L key until “LOW” is displayed on the
LCD. This reduces transmission power to one
watt, prolonging battery life.
4. Press and hold the PTT (Press To Talk) key and
begin your transmission. The TX symbol will
appear on the LCD display. (Figure 11)
5. Speak directly into the microphone on the front of
the unit (see page 2) and hold the unit vertically 1
to 2 inches from your mouth.
NOTE: VHF Marine Radios communicate over
distance by “Line-of-Sight”, which means that the
signal may be blocked by objects such as land
forms, large vessels, etc. It is therefore important
to transmit with the antenna in a vertical position
and with the radio positioned as far above the
water as is feasible.
6. Release the PTT key when you have completed
your transmission.
NOTE: You must use a specific communication
style when using a marine radio, such as your
station call sign or boat name and ending your
transmission with proper terminology such as
“Over”. Refer to the “Maritime Radio User’s
Handbook”. Also be aware that the unit will
automatically cancel TX after the PTT key has
been pressed for more than thirty seconds to limit
extensive transmissions and protect the unit
from damage.
Receiving
and
Transmitting