<s>
The	O
Battenberg	B-Device
course	I-Device
indicator	I-Device
is	O
a	O
mechanical	O
calculating	O
device	O
invented	O
by	O
Prince	O
Louis	O
of	O
Battenberg	O
in	O
1892	O
for	O
taking	O
station	O
on	O
other	O
vessels	O
whose	O
range	O
,	O
bearing	O
,	O
course	O
and	O
speed	O
are	O
known	O
.	O
</s>
