Abrupt-Sloped Seabed
Side lobe
False echo
A dim echo may sometimes appear along an abrupt slope of seabed, as if it were floating
above the slope, when recording.
In case of flat seabed, thin second return of seabed may sometimes appear, which is slightly
below the actual seabed.
In either case, the dim or thin echoes are false and produced by side lobes of ultrasonic
beam from the transducer. Any false echo is thinner than and parallel to a real echo.
Appendix 64
Содержание JFE-380 -
Страница 1: ...m INSTRUCTION INSTRUCTION MANUAL MANUAL Echo Sounder Echo Sounder JFE 380 JFE 380 ...
Страница 2: ......
Страница 9: ...External View External View vii ...
Страница 17: ...1 5 System Configuration 1 Introduction 5 ...
Страница 44: ...4 Operation 32 2 HISTORY print mode 3 LOG print mode 24hours history 30minutes log 1hour time mark ...
Страница 51: ...5 1 Installing the Recorder Unit Flush Mount Equipment Figure 3 1 5 Installation 39 Unit mm Unit mm ...
Страница 52: ...Wall Mount Equipment Figure 3 2 5 Installation 40 Unit mm ...
Страница 54: ...NKF 345 5 Installation 42 ...
Страница 55: ...NKF 392C 5 Installation 43 ...
Страница 73: ...Appendix Noise Bubble Noise Bubble Interruption Interference Noise from other ship Plankton layer Appendix 61 ...
Страница 79: ......