L-3 Communications Navigation Echosounder LAZ 5100 User 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