If this had happened in the so called "marine park" then it usually means that the yacht paid the "mooring fee" for just the right to drop an anchor in the desi

If this had happened in the so called "marine park" then it usually means that the yacht paid the "mooring fee" for just the right to drop an anchor in the designated space. Designated by the "local authority", btw. And for megayachts these fees are quite high (hundreds or thousands of dollars).