A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 5910-00-920-0483
NSN 6240-00-437-5216
NSN 6130-00-311-4192
NSN 6650-00-539-7298
NSN 5895-01-356-6335
NSN 5975-00-942-1925
NSN 5985-01-606-3425
NSN 5950-01-649-2376
NSN 6150-01-168-9722
NSN 6130-00-938-9361
NSN 5935-00-556-7481
NSN 6240-00-163-5143