[sramam]

> The only thing that changes is distribution of mass (depending on where the tank is and where they keep bottles with drinks). A tonne of pee gathered from all over the plane is most likely less effect than 3-4 people moving from one end to another end of the plane. So a stewardess with help and a cart.

My informal search [1, 2] seems to indicate that every galley seems to have WC close by, though not vice-versa. Would never have thought to attribute that to an engineering decision before this discussion!

[1] https://theflight.info/seat-map-boeing-737-800-united-airlin... [2] https://theflight.info/seat-map-airbus-a320-200-united-airli...

PS: Also amazing that thanks to COVID, I actually had to look up images of airplane layouts!