<s>
The	O
HEMPAS-CCIAS	B-Algorithm
radar	I-Algorithm
is	O
a	O
passive	B-Algorithm
radar	I-Algorithm
developed	O
by	O
five	O
Greek	O
scientists	O
.	O
</s>
<s>
It	O
can	O
identify	O
helicopters	B-Application
and	O
aircraft	O
even	O
under	O
complete	O
electronic	O
mute	O
,	O
i.e.	O
</s>
