The left and right values are concatenated together in a previous step.

I'll assume this is necessary for something else, otherwise it would be much easier if your arrays looked like this: @UAS = ( [8,0], [9,0], ...);

But with the concated elements, I only see the general solution of splitting them up again, like this:

sub PRINT {
   printf("\n\t\t%-10s %-10s %-10s\n",'UAS','LCV','DM');
   while(@UAS || @LCV || @DM) {
       my @args = map { (defined) ? split(' ') : ('','') }
                      shift(@UAS), shift(@LCV), shift(@DM);
       printf("\t\t" . '%3s  %-5s ' x 3 . "\n", @args);
   }
}
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-- Hofmator