Flushing the Head

[Bullish]

Can someone explain the difference bettwen the red button which is labeled "flush" and the black switch which "fills" and "drains" the toilet?

I want to make sure that when I am offshore, I am using the switch that flushes right overboard and not into the tank.

Also, when offshore, can you push the "tank pumpout" button in the bathroom and empty waste from your tank right overboard?

[Petty Cash]

If i remember correctly, the black toggle fills the toilet red flushes it out or in the holding tank all dependent on which way the y valve is. And tank pump switch is a siver pushbutton. And I read when pumping the holding tank make sure to not pump dry.Also I'm pretty sure you can pump holding tank offshore just after 3 miles.