== cmdfile.48 ==
    $NAV_MODE,2
    $HEADING,-1
    $ALTIM_PING_DEPTH,0
    $ALTIM_PING_DELTA,0
    $HD_A,0.00251
    $HD_B,0.00804
    $HD_C,2.68e-6
    $C_VBD,2792
    $GO