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(2) MAX GAIN
Computational result is over a certain level, MAX GAIN is the correction value
to set the GAIN to a certain level.
(3) GAIN OFFSET
GAIN OFFSET corrects the level of the TVG computational result.
(4) SEA BOTTOM GAIN
SEA BOTTOM GAIN adjusts the level deeper than the sea bottom.
(5) ES OUTPUT
This is for setting the ES output signal (analog signal output for the tele-
sounder) to be sent from SR-87 transceiver to external equipment.