A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 5905-01-111-1275
NSN 6145-01-452-5841
NSN 6150-00-223-9761
NSN 5975-01-207-7304
NSN 5895-00-118-3152
NSN 6135-01-116-3385
NSN 6145-00-062-7897
NSN 7035-01-416-5910
NSN 6105-00-054-7422
NSN 5905-00-760-8308
NSN 7035-00-369-6346
NSN 5945-01-634-0588