WAMBLEE S.R.L. UNIPERSONALE
Via Vittori 19
I-48018 FAENZA (RA)
+39 0546 623891
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+39 0546 623891 (aut.)
C.f., P.Iva e Reg. Imprese Ra no. 02276360399 - Capitale Sociale 10.000,00 €
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approximation of about 3/5mn. For this reason the EPIRBs are equipped with a second
frequency (121.5 MHz, the same as W400 or W470 MSLD (MOB)) that can help SAR units
to localize better the position of the accident. We choose the 121.5 MHz as the rescue
frequency of the W400 or W470 devices so that it can also be received from the SAR units
which work in the area. For example if it is not possible to determine the position of the
man -overboard, the master of the ship can contact the SAR units and request an
intervention by using the 121.5 MHz frequency as search frequency.
Which is the range covered by MSLD systems?
The range covered by MSLD (MOB) systems is indicative and depends on the technical
characteristics of the emission of the signal; following is an indicative summary table:
Device
Range covered
W400
(121.5 MHz, 100mW)
Between shipwrecked person and vessel = ± 2nm
Between shipwrecked person and aircraft = ± 10nm
W420
(AIS1 and AIS2)
Between shipwrecked person and vessel = ± 5nm
Between shipwrecked person and aircraft = ± 40nm
W470
(AIS1 and AIS2)
(121.5 MHz, 100mW)
As indicated above for each single frequency
Aircraft at a height of 3000 ft.
Who can receive this emergency signal in addition to my vessel?
With the exception of the W400 device, for which you must have installed on board a
specific receiver (or you should inform the SAR unit of the presence of a man overboard
with MSLD device operating on the aeronautical band), for the other devices the reception
of the MSLD signal is possible provided they are capable of receiving the AIS protocol.
Is it possible to try the device without having to activate a distress signal?
Yes, it is. You just have to leave the main knob on TEST postion and press the activation
button.
For the devices equipped with GPS module (W420 and W470), the test sequence has two
modes: short and long.
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