Someone

diff -urN gpsd-2.33-old/nmea_parse.c gpsd-2.33/nmea_parse.c
--- gpsd-2.33-old/nmea_parse.c  2006-07-31 00:17:09.000000000 -0700
+++ gpsd-2.33/nmea_parse.c      2006-07-31 00:20:58.000000000 -0700
@@ -266,6 +266,7 @@
        mask |= LATLON_SET;
         session->gpsdata.satellites_used = atoi(field[7]);
        altitude = field[9];
+       printf("altitude = [%s]\n",altitude);
        /*
         * SiRF chipsets up to version 2.2 report a null altitude field.
         * See <http://www.sirf.com/Downloads/Technical/apnt0033.pdf>.