This upgraded lens differs in two ways from the original Lewmar part:
• Since Lewmar products are made in England, the original lenses were not the same color as the American made product used by Catalina Yachts for the fixed ports. The upgrade is American made to the same color specifications as Catalina's fixed ports.
• Slightly thicker and stronger by about .023", a slight recess is milled into the inboard surface at the dogs.
• Mount the lens with the milled recess toward the inside of the boat.

Known Usage:
• To the best of our knowledge, these ports are used only in the Catalina 42.

There may be other uses we are not aware of. They were also not used every year the boat was produced.

Port:
• Outside of mounting flange (measured on the outside of the boat): 449mm x 191mm (about (17-11/16" x 7-1/2")
• Cut out size: 429mm x 171mm (about 16-7/8" x 6-3/4")

Lens:
• Height: 5-5/32"
• Width: 15-3/8"
• Thickness: 5/16"

Please note that these ports are built in England and made to metric system standard dimensions. All Imperial equivalents are approximate.

1) Don't assume your Catalina 42 uses these portlights. Catalina might have had a different brand of portlight on the shelf which they used until their supply was exhausted at a later date.

2) Like paint and fabrics, the color of any one run of product may vary slightly from the next. The color will also change slightly with age.

3) The exact thickness of any Acrylic sheet will vary slightly from one sheet to the next. Lewmar Size 3