[FT] FTMap and half inches

in Cinematic movement, half of a ship's turn points are spent,
then half velocity is spent forward, then half turn points are spent,
then remaining half of velocity forward.  How does FT Map handle the
case of halfing an odd number?	Is the turn spent exactly in half
with fractional facing?  Is the forward velocity split exactly in
half with half units?  I realize that in a FtF game, house rules can
be used, but how does FT Map handle these cases?

Thanks.

--Greg