Traceback (most recent call last):File "/usr/bin/xgpsspeed", line 1015, in <module>Main(File "/usr/bin/xgpsspeed", line 652, in __init__self.widget = NauticalSpeedometer(^^^File "/usr/bin/xgpsspeed", line 305, in __init__Speedometer.__init__(self, speed_unit)File "/usr/bin...