User’s Manual
Page 82 of 117
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The easyTRX2 (-IS) is using the FAT format. If the SD Card has got another
format, you have to format it again with the easyTRX2 (-IS). It’s because
the device is storing a special set of files, which enable real time storing of
AIS and GPS data.
Once formatted, you can remove the SD card whenever you want. No
data will be lost. In the case of a voltage drop the latest received data is
still recorded. There is no data loss caused by power sag.
Corresponding markings are displayed in the status box.
19.6
CPA Alert
The "CPA Alert" tab gives the possibility to configure parameters which
trigger an alarm. CPA means "Closest Point of Approach" to a ship
transmitting its position, bearing and speed via AIS.
The easyTRX2 devices have a built-in feature which calculates the CPA
with every received AIS target.
You can now set a safety radius (around your ship). If a ship enters the
safety radius (in this example 500 m) within the stated time limit (here 30
minutes) the CPA alarm occurs.
You may change the radius and the time by clicking on the arrows and
transfer it to the easyTRX2 by clicking on "Program". You can check the
current settings of the transponder by clicking on "Read". The settings
remain in the device i.e. it is not necessary to program it again after
restart.
The CPA alarm can be disabled by pressing the button "CPA-Alarm ON".
Here as well, the settings done with "Program" are applied to the
easyTRX2 and checked with "Read".
CAUTION:
Only vessels, which do have a properly working AIS aboard, are able to
trigger the CPA alert in the easyTRX2 Transceiver!! Therefore you should
always watch out for other vessels which are on collision course!!!
