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Use these checklists to help you prepare 

your VR4-UWM for deployment, successfully 

deploy the receiver, and gather the data 

when you return to the deployment location.

Do not bump the VR4-UWM 

hydrophone or expose it 

to extreme temperature 

variations.

Doing so may damage the receiver and 

render it unable to detect transmitters.

Electronics inside the case must 

NEVER come in 

contact with any water

 or the VR4-UWM will be 

damaged.

 

F

 Benthos Deck Box - fully charged prior 

to field day and/or make sure you have 

a “clean power source” to power the 

unit.

 

F

 Benthos surface modem transducer

 

F

 Dummy plug if receiver has an unused 

external connector (serial port)

 

F

 Laptop with latest VUE software and 

VR4-UWM user manual installed

 

F

 DB-9 to USB adapter (if necessary) with 

software drivers installed 

 

F

 Complete mooring inventory

 

F

 VR4-UWM  receiver

 

F

 VEMCO Comm key 

(magnet)

 

F

 GPS

 

F

 Bluetooth® USB adapter

 

F

 Serial  cable

Equipment

 

„

Initialize VR4-UWM before deploying.

  Use 

the magnet and the VUE software (Bluetooth 

communication) and start recording to remove the 

receiver from Suspend mode.

 

„

Do not open the case

 except to change battery. 

This receiver was sealed and pressure tested prior to 

shipping.

 

„

Never deploy

 a VR4-UWM 

beyond 500 meters

 depth.

 

„

Do not deploy VR4-UWM receivers with the 

same 

modem address within 5 km of each other

. Doing 

so could disable modem communications with the 

surface acoustic modem.

 

„

Do not allow the VR4-UWM to be 

dropped or struck

 

against other objects.

 

„

Do not mix different metals

, especially in contact 

with each other. This will promote galvanic corrosion 

and cause rapid failure of the hardware.

 

„

Initializing the VR4-UWM will erase the receiver’s 

memory

.  Retrieve all detection logs before the VR4-

UWM is initialized.

Important 

 

F

 Make  sure 

latest VUE version

 is installed on PC, including the latest 

manuals

.

 

F

 

Start a study

 using VUE software and Bluetooth communication (exit Suspend mode).

 

F

 Perform  an 

in-air test

 (see manual) using 

Bluetooth

 communication.

 

F

 Perform  an 

in-air test

 (see manual) using 

Benthos

 acoustic modem communication.

Preparation - On Land

Never cover the Status Light/

Release Valve.

The Release Valve 

must be able to pop 

open

 if needed and must not be blocked 

by tape or paint.

VR4-UWM Receiver

Checklists

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