Lion Roar brass 1:700 scale photo-etch set R7032 is entitled IJN Aircraft Carrier Drain. What is a carrier drain? When I saw them I thought they were hull side catwalks and the photographs were labeled as such. I was wrong. Dan Kaplan knew exactly what they were. "These are not catwalks. IJN CV flight decks were ringed with rain gutters. That's what LionRoar's "Drains" are meant to depict, though only the top of them. In reality, in cross-section, they would look just like rain gutters with a support tab spaced every 6" or so on top." Lion Roar provides thirteen runs of drains in two different patterns.