A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 6610-01-195-3497
NSN 5965-01-493-4895
NSN 5920-00-155-2173
NSN 2925-00-740-7029
NSN 5910-01-578-6803
NSN 5935-00-938-3451
NSN 6110-01-226-4013
NSN 6220-01-221-1332
NSN 5996-01-600-0348
NSN 5950-00-581-9999
NSN 6130-00-674-7020
NSN 5990-01-259-7138