A multilayered polymer film includes a first set of optical layers and a second set of optical layers. 1% to about 6% of a hydrotrope, providing from about 22% to about 50% crutcher mix moisture, providing from about 0. A bulkhead support is fastened to the aircraft structure. A singlet lens element has a positive power, The lens group has an object surface facing the object and an image surface facing the image. The vane assembly is followed by filters, which capture the liquid that passes through the vane assembly.