System Components; Towfish; Tpu - Klein 5000 V2 Series Operation And Maintenance Manual

1-2
CHAPTER 1 Overview
1.2

System Components

The main components of the Series 5000 V2 Sonar System are the towfish and the
topside system. The towfish is the underwater component and is towed with an
armored coaxial tow cable up to 800 meters in length. The topside system provides
the power source for the towfish and receives, stores and processes data acquired
by the towfish. The towfish connects to the topside system using an optionally
supplied winch with slip rings and an armored coaxial tow cable. A terminated,
light weight deck cable is optionally supplied for connecting to the winch or for
connecting directly to the towfish for testing. The topside system is composed of
two separate main components:
• Transceiver and Processing Unit (TPU)
• SonarPro Workstation
In addition, a K-Wing I or K-Wing II Depressor can be installed on the towfish
which enables a greater towing depth with less cable deployed.
1.2.1
The towfish, which is shown in Figure 1-1, consists of a negatively buoyant
stainless steel towfish housing with attached port and starboard sonar transducer
arrays, an altimeter, a nose cone, and a tail cone with stabilizing fins. Inside the
towfish housing is a pressure housing containing the sonar electronics, a downlink
demultiplexer for control signals, an uplink multiplexer for sonar and sensor data,
a transmitter board for transmit pulses, receiver boards for receiving signals, and
the compass, pitch/roll and pressure sensors. The downlink control signals and the
uplink sonar and sensor data are multiplexed onto a single conductor coaxial tow
cable. An electro-mechanical termination is provided on the towfish end of the tow
cable, where a shackle provides a strong, reliable mechanical termination to the
towfish tow bracket, and an underwater connector connects to a jumper cable on
the towfish. Four carrying handles, two forward and two aft, are included for
lifting and transporting the towfish. The installed safety cable minimizes the
chances of losing the towfish should it collide with an obstruction.
1.2.2
The TPU is housed in a 19-inch rack mountable 2U chassis and connects to the
towfish directly using an optional coaxial tow cable, or to an optionally supplied
winch using an optionally supplied deck cable, where the winch connects to the
towfish using a tow cable. The deck cable can also be used to connect the TPU
directly to the towfish for testing. The TPU receives and demultiplexes the sonar
and sensor data from the towfish and transfers the data to the SonarPro
Workstation over an Ethernet connection. The TPU provides power and downlink
Series 5000 V2 Sonar System Operations and Maintenance Manual

Towfish

TPU

P/N 11214512, Rev. 04