Catalina 350 International Association

I tested the capacity of the holding tank of my 2005 350 (hull 320) and found it to be 18 gals. Also found that the tank guage, even after recalibrating, shows it "full" at about 10 gals. An earlier model 350 in our marina (2003 ?) has a holding tank with a nominal capacity of 26 gals. Pau...

Has anyone tried to install Oceanair hatch shades on the salon hatches? If so what size did you use?

Paul
Hull 320