*** DO NOT RELY ON THE OUTPUT OF THIS PROGRAM FOR DECISIONS THAT CAN *** *** RESULT IN HARM TO ANYONE OR ANYTHING. REALLY. I MEAN IT. *** Agencies like NOAA exist because there is a need for certifiably correct tide predictions. Please don't rely on XTide if you need guaranteed results. There is NO WAY I can get certified data on a zero budget. I rely on users like you to tell me when something is wrong. Please continue to do so.