In fact, one can show that, if you keep taking for a long time, it it seems to be a never
repeating kind of a signal as called as type of a signal is concerned, it will never be
exactly same and this is what we call obviously irregular waves. Irregular, the word
irregular is more used by or coined by you know ship people, people never like it as a
background, but eventually when this offshore structures are coming up, more of civil
engineering people were concerned, they started using the word random waves which is
both are same thing. So, this we will use it interchangeably, irregular means random.