A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 5855-01-254-3041
NSN 6685-01-210-4404
NSN 5945-01-122-5176
NSN 5990-01-376-8930
NSN 6610-01-579-9038
NSN 6130-01-437-9030
NSN 6645-01-470-0635
NSN 6150-01-079-1678
NSN 5920-01-063-5769
NSN 6685-00-106-6514
NSN 5935-01-517-0620
NSN 6320-01-114-6054