Pressure Sensor; Power Loss Pinger; Responder - Edgetech 4200 User Hardware Manual

1.5.4 Pressure Sensor

A stainless steel pressure sensor can be installed in the tow vehicle to provide tow vehicle depth data.
This type of pressure sensor is designed for continuous use in a corrosive liquid environment and is
available in a 3000-psi pressure range for the 4200-SP and 4200-MP Tow Vehicles.

1.5.5 Power Loss Pinger

A power loss pinger activates when tow vehicle power is lost, and the tow vehicle is submerged. If this
happens, the pinger will continuously transmit an acoustic pulse that can be received by a pinger locator.
The pinger is fully self-contained in an aluminum housing and includes an internal battery.

1.5.6 Responder

The tracking system deck unit provides a trigger that is input to the topside processor. The topside
processor outputs the trigger signal to the tow vehicle by combining the signal with the downlink
command and uplink sonar data signals. The tow vehicle will then output the TTL for a customer-supplied
responder.
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