L-3 Communications Navigation Echosounder LAZ 5100 - Manual (Page 14)

Page 2-2
L-3 ELAC Nautik
Table of maximum measurable water depth, depending on frequency, transducer type, cable
length.
Transducer
Type
Frequency Manufacturer Electrical
Power
Maximum Cable
Length
Maximum
Waterdepth
LSE 132 30 kHz Elac Nautik 450 Watt 600 m 1200 m
LSE 297 50 kHz Elac Nautik 250 Watt 400 m 600 m
LSE 133 50 kHz Elac Nautik 450 Watt 600 m 1100 m
SW 6016 100 kHz STN Atlas 200 Watt 150 m 300 – 350 m
LSE 148 100 kHz Elac Nautik 450 Watt 200 m 350 – 400 m
LSE 313 200 kHz Elac Nautik 250 Watt 150 m 250 – 300 m
LSE 135 200 kHz Elac Nautik 250 Watt 150 m 250 – 300 m
The depth values can only be reached with limited cable length and an undisturbed
acoustic and electric receiver channel.
For cable length longer than mentioned in the table the electrical power of the echosounder has to
be increased according to manufacturer's release.
Table 1 and 2 show as an example cable loss depending on frequency and cable length and the
corresponding possible depth measurements for the frequencies 50 kHz and 100 kHz.
Table 1: Cable loss for 100 kHz and 50 kHz
Cable length in m Loss in dB at 100 kHz Loss in dB at 50 kHz
50 1.2 0.8
100 2.8 1.7
150 4.5 2.6
200 6.3 3.6
250 8.2 4.6
300 10 5.6
Table 2: Depth measuring performance, cable length- dependent for 100 kHz and 50 kHz
Cable length in m Depth in m at 100 kHz Depth in m at 50 kHz
50 270 600
100 250 580
150 230 560
200 200 540
250 180 515
300 170 495