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1.7.0 WEARING THE AU9
The Sea Marshall® AU9 unit can be worn in a number of different ways, some of which will
increase the tracking range by putting the antenna in a more suitable position for maximum signal
propagation. Always ensure the body of the unit will be under the waterline on immersion to
allow the auto-activation function to activate. Also the ground plane provided by the water serves
to boost the signal giving a greater tracking range. The AU9 can be fitted to any 150 and 275N
lifejacket. MRT offer a range of jackets with a pre-made internal PLB pockets and antenna loops
ask your re-seller for details or look at our product catalogue for further details. The AU9 can also
be fitted into an existing lifejacket by using a neoprene PLB pouch (Product Code – 07-006-S )
which is designed to fit and hold the body of the AU9 onto the waistbelt of a lifejacket, the
antenna is then fed up into the lifejacket cover and up onto the bladder as shown over the next
few pages.
1.7.1 Fig. 13 is an overview of how the AU9 PLB can be worn, the larger the tick = greater the
tracking range/’SOS’ signal transmission
The manufacturer recomends fitting the AU9 to lifejacket with the antenna clip in
place for the following reasons:
1. ENSURES YOUR ALERTING UNIT/PLB IS ALWAYS WITH YOU
2. PROTECTS YOUR PLB DURING DAY TO DAY USE
3. INCREASES TRACKING RANGE OF AU9, MAKING YOU MORE ‘VISIBLE’
Wearing a lifejacket is a very good thing…but if they can’t quickly locate you …what’s the point?
Fig. 15
NOTE – the tracking alarm activation range of the sytem is reduced when the transmitter is worn
around the neck due to absorption of signal by the body and the reduced height of the antenna
above the water line.
NOTE – the tracking ranges listed in this booklet are taken from tests where the receiver antenna has been correctly installed at the
recommended height with the AU9 correctly installed in either an SMB for divers or lifejacket, with antenna clip for normal use. The
SMB gave the maximum range listed as achieved during tests, the lifejacket AU9 installation gave the lower end of the ranges listed.
Wearing the AU9 around the neck will reduce the tracking/alerting ranges to below the ranges listed here in.
The following pages show how the AU9 can be worn or fitted into a lifejacket.
Содержание AU9
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