05.12.2014-08:43:02 TRACE AA0009E (GPS/NMEAserial.pm:get_heading:271)> Receiving $HEHDT,123.47,T*1C
 on /dev/nmea
05.12.2014-08:43:02 TRACE AA0009E (GPS/NMEAserial.pm:get_heading:292)> $VAR1 = bless( {
                 '_CKS_' => '1C',
                 'TrueHeading' => '123.47',
                 '_STRING_' => '$HEHDT,123.47,T*1C',
                 '_calcCKS_' => '1C',
                 '_ELEMENT_' => 'HDT',
                 'HDTT' => 'T',
                 '_ERROR_' => undef,
                 '_DEVICE_' => 'HE'
               }, 'NMEAdata' );
05.12.2014-08:43:02 DEBUG AA0009E (GPS/NMEAserial.pm:get_heading:295)> Received true heading: 123.47
-----------------------------------------------------
05.12.2014-08:43:04 TRACE AA0009E (GPS/NMEAserial.pm:get_heading:271)> Receiving $HEHDT,123.48,T*13
 on /dev/nmea
05.12.2014-08:43:04 TRACE AA0009E (GPS/NMEAserial.pm:get_heading:292)> $VAR1 = bless( {
                 '_CKS_' => '13',
                 'TrueHeading' => '123.48',
                 '_STRING_' => '$HEHDT,123.48,T*13',
                 '_calcCKS_' => '13',
                 '_ELEMENT_' => 'HDT',
                 'HDTT' => 'T',
                 '_ERROR_' => undef,
                 '_DEVICE_' => 'HE'
               }, 'NMEAdata' );
05.12.2014-08:43:04 DEBUG AA0009E (GPS/NMEAserial.pm:get_heading:295)> Received true heading: 123.48
-----------------------------------------------------
Heading ACU: FE00807B000000000000 
Heading degrees: 123.48