A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 6130-01-272-6781
NSN 6110-00-359-5571
NSN 5960-00-322-8562
NSN 5985-00-615-9766
NSN 2925-01-472-4423
NSN 6650-01-529-6721
NSN 5835-01-332-2380
NSN 5985-01-419-3502
NSN 5998-01-190-0730
NSN 5975-01-069-2196
NSN 5905-01-199-1312
NSN 6220-00-527-1177