System description
11
857-160970 / Rev.H
Transducer Range
bottom,
m
Range
fish,
m
Transmit
power,
W
Band
width,
Hz
Pulse
duration,
ms
Frequency,
kHz
120-- 25 120 1.02 3026 1000 390 800
ES120--7 120 1.02 3026 1000 440 850
50/200D 200 1.03 3088 1000 280 550
ES200--7 200 1.03 3088 1000 270 550
Typical observation ranges are shown in the figure. Using the
Simrad 27-26/21 transducer (27 kHz, 10x13 degrees, 3000 W)
you can observe a 60 centimeter cod down to 800 meters, and
bottom detection works down to 3800 meters. However, with
the Simrad 200-7F transducer (200 kHz, 7x7 degrees, 1000 W)
you can only observe that same cod down to 260 meters, and
bottom detection becomes unreliable below 500 meters.
These range calculations assume a normal sea water salinity
(3.5%) and temperature (+10 degC), an average bottom (surface
backscattering strength = -20 dB) and a noise level typical for a
moving vessel.
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