A novel method of adjusting on, or indicating, targets to mortars has been
reported to be introduced by the Japanese in Burma. Two machine guns are sited
on the target and open up with tracer. About 30 seconds later, the first mortar
bomb falls, being aimed at the intersection of the two tracer streams.
Although a certain amount of organization and training is necessary for
the operation of this system of target indication, it is considered to have the
advantage of being able to spot and indicate targets which could not be observed
from a fixed observation post.