A framed unit, with attachments to exclude water and control the entrance of air and light, designed to fit a ship's porthole.
NSN 6240-00-218-1480
NSN 5855-01-428-9456
NSN 6650-00-035-9297
NSN 5950-01-289-9527
NSN 6645-01-324-8185
NSN 5835-00-474-6085
NSN 6620-00-538-8746
NSN 5985-01-164-9947
NSN 6240-01-353-5029
NSN 6135-01-347-0201
NSN 6130-00-283-7948
NSN 5945-01-271-7456