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DRAFT
Sets the ship’s draft, to show the depth between the sea surface and the bottom (rather than
from transducer to bottom). When the picture recorder MT-12 is used to replay the recording
data, set the draft to –2.0 ft.
FREQ CHOICE
You can select the transmitting frequencies for the following transducers. Select the frequency to
use on this menu.
This function is useful when there is interference from other vessel, or when targeting certain fish
species.
50kHz/75kHz transducer
Using the following transducers with 75 kHz provides high resolution.
•
50B-6
•
50/200-1T (50kHz)
•
50/200-1ST(50 kHz)
•
50B-9
•
50B12
88 kHz/22 kHz transducer
Using the following transducer with 22 kHz frequency enables long range detection, a
characteristic of low frequency.
•
88B-10
Note:
When the above transducers are used with 75 kHz or 22 kHz, the transmission line may
be longer slightly.