Avalanche Victim Detector
A
Introduction
Avalanche
Victim Detector (AVD) is also known as Avalanche Transceiver. These are small,
compact radios used to identify avalanche burial sites. They transmit
electromagnetic signals that are picked up by another transceiver on the
receive mode.
AVD
works in two modes ie receiving and transmit or search mode.
(a) Transmit
mode. AVDs are carried by all
the persons moving through an avalanche prone area. Before moving across a
slope where an avalanche is expected, AVDs are set on transmit mode. In case
somebody gets buried in the avalanche then the AVDs of rescue party can detect
the signals of AVD buried with the victim and the individual can be rescued.
(b) Receiving
mode (Search mode). AVD carried by
the rescue team are kept on receiving mode. In receiving mode as soon as AVD
picks up the signal, the approximate distance and direction appears on the
display. The no of burials within the range of the AVD is also displayed on the
screen. An AVD can detect a victim buried 20 m deep in snow in a radius of 50
m.
Technical
Data.
(a) Transmission frequency 457 kHz.
(b) Power supply 3 batteries (pencil
cell).
(c)
Battery
lifetime 200
h send mode.
(d) Temperature range –20 degree Celsius to +40 degree
Celsius.
(e) Weight 198gm (incl batteries).
(f) Dimensions(L/W/H) 116/75/27mm.