I was watching the leap second on the NMEA output of my Garmin GPS18,  
displaying the RNC and GGA sentences.  The GGA sentences repeated  
235959, but the RMC sentence repeated 000000.

$GPRMC,235958,A,3855.4967,N,07723.0144,W,000.0,013.3,311208,010.5,W*7D
$GPGGA,235958,3855.4967,N,07723.0144,W,1,07,1.9,119.9,M,-33.9,M,,*7C
$GPRMC,235959,A,3855.4967,N,07723.0144,W,000.0,013.3,311208,010.5,W*7C
$GPGGA,235959,3855.4967,N,07723.0144,W,1,07,1.9,120.1,M,-33.9,M,,*7F
$GPRMC,000000,A,3855.4967,N,07723.0144,W,000.0,013.3,311208,010.5,W*7D
$GPGGA,235959,3855.4967,N,07723.0144,W,1,07,1.9,120.2,M,-33.9,M,,*7C
$GPRMC,000000,A,3855.4967,N,07723.0144,W,000.0,013.3,010109,010.5,W*7D
$GPGGA,000000,3855.4967,N,07723.0144,W,1,07,1.9,120.3,M,-33.9,M,,*7C
$GPRMC,000001,A,3855.4967,N,07723.0144,W,000.0,013.3,010109,010.5,W*7C
$GPGGA,000001,3855.4967,N,07723.0144,W,1,07,1.9,120.4,M,-33.9,M,,*7A

Odd.

Ralph


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