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4200 SIDE SCAN SONAR SYSTEM USER HARDWARE MANUAL 0004842_REV_N
Figure 1-3: 4200 SP and MP Tow Vehicle Diagram
1.3.2.1 4200-SP Tow Vehicle
The 4200-SP Tow Vehicle is available in the customer’s choice of 100/400 kHz, 300/600 kHz, or 300/900
kHz dual linear FM chirp operating frequencies. The tow vehicle includes identical port and starboard aft-
mounted transducer arrays, where each includes a high frequency and low frequency transmit/receive
element.
The tow vehicle electronics include four separate transmitters and four separate receivers. Received sonar
signals are digitized and transmitted to the topside processor over an ADSL link, using a coax tow cable up
to 6000 meters in length (contact E
DGETECH CUSTOMER SERVICE for questions concerning cable type vs.
lengths).
The tow vehicle operates in a single pulse (SP) mode only. The maximum tow vehicle speed that will
ensure compliance with the NOAA and IHO-44S Shallow Water Survey Specification of three pings on a 1-
meter cubed target with a range set at 100 meters is 4.8 knots.
connector
Magnetometer
Key
MP only transducer elements
LF HDM: Transmit/receive
HF HDM: —
LF HSM: Transmit
MP transducer elements
LF HDM: Transmit/receive
HF HDM: Transmit/receive
LF HSM: Receive
HF HSM: Receive
SP transducer elements
LF: Transmit/receive
HF: Transmit/receive
handle, one
forward and
housing