Marport Trawl Explorer, Руководство по обслуживанию

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Trawl Explorer | V5 | Sensor Configuration
Sounding Modes
The sensor can send pings according to three different sounding modes.
Down 1
Sensor sends pings towards down direction ( 1 ) only.
You can see fish going into the trawl.
Pings are sent quicker than with the other modes, so more
data is received, which enables a better horizontal resolution.
This mode is recommended for better quality echogram
images.
Down 1 + Up
Sensor sends pings towards down ( 1 ) and up ( 2 ) directions.
With the down sounding, you can see fish going into the
trawl. With the up sounding you can see if fish are missing
the trawl and passing above the headline. This way, you can
correct the trawl position.
Fewer pings are sent because they are distributed between the
2 directions. As a result, data arrives slower to the receiver
and echograms are of lesser quality.
Down 1 + Down 2
Sensor sends 2 consecutive pings towards down direction ( 1
and 2 ).
This mode is useful if you need to test two different pings
towards the down direction. For example, sending one short
and one long ping, or sending one low frequency and one
higher frequency ping.
Like down + up mode, fewer pings are sent because they are
distributed between the two different down soundings. As a
result, data arrives slower to the receiver and echograms are
of lesser quality.
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