Set up a wiring schema that looks like this and put it to set state (because it constantly sends a signal, toggle will spaz out).


Logic:

Upper water detector: If water is detected, send TRUE to the AND component
Lower water detector: invert signal with NOT -> If water is detected, send FALSE to the AND component; send TRUE if water is not detected.

AND component therefore sends a signal to the duct WHILE the upper detects water and the lower does not. This means that if the lower room floods, it will prevent additional flooding from normal duct setups that only detect water in the upper room and then open the duct, letting water in from the flooded room below.

This setup grants the benefit of draining water to the ballast or a pump room, while preventing back-flooding that results when a lower room is completely flooded and an upper room has a small leak which triggers the duct to open, allowing the lower room with a breach to flood water upwards. (cascading floods suck)

I don't know why this setup is not commonly seen or in vanilla hulls, or if it's something you're supposed to figure out on your own or if no one thought of it, or what. Doesn't really matter.


Now you can get the benefits of ducts without several downsides. If your ballasts or aux pump room are unable to keep up with the flooding, the ducts will shut off while the room below is completely flooded (or whatever height you set the lower detector).


This is generally what I consider a standard layout for the schema. The horizontal wall is at .35 scale so that it matches the size of the duct, so that there is no "dead zone" in the spacing that allows for extra water (or incidental flooding due to a hull not being enclosed by walls) and lets the hull of the rooms meet nicely.


o7


I haven't played the game in ages but it occurred to me I should create this guide.