A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 5920-00-833-7245
NSN 6145-01-003-9741
NSN 5975-01-032-8090
NSN 6320-00-557-3079
NSN 6110-01-250-2936
NSN 6150-00-619-1711
NSN 6685-00-448-9484
NSN 4140-00-450-5827
NSN 5835-00-984-1233
NSN 6130-00-218-1363
NSN 5915-01-215-5942
NSN 5999-00-206-0444