If your marine toilet has a y vaule what must you do in a no discharge zone?

In a no discharge zone, if your marine toilet has a Y-valve, you must ensure that the valve is set to the "holding tank" position. This prevents any waste from being discharged directly into the water. Additionally, you should regularly monitor and maintain the holding tank to comply with local regulations and avoid any potential overflow. Always familiarize yourself with the specific rules of the no discharge zone you are in.