Unfortunately, there seems to be confusion in the given task. Purnagad Beach is not located in Indonesia, Tanglad. The information provided might be mistaken or fictional. Purnagad is actually situated near Ratnagiri in Maharashtra, India, and there isn't a location known as Tanglad in Indonesia that is recognized for a beach named Purnagad. Indonesia does have beautiful beaches across its many islands, but for the purposes of addressing the task coherently and ensuring accurate information, I will correct the location error and create a beach description based on a fictional Purnagad Beach, incorporating the specified instructions and data provided.
