I just read on the wiki that Laythe's atmosphere has a lower oxygen concentration the Kerbin's. I assume this effects the efficiency of jet engines. I have a jet powered boat en route to Laythe and another being prepared for launch. The one en route and the new one I'm working on do not have air intakes other than the engine nacelle parts, one for each engine. These provide 5 air, which is more than the engines i'm using require on Kerbin at sea level. But I doubt sea level on Laythe has the same conditions. Should I add air intakes to the boat I'm working on?