The transit of Saturn from one Zodiac sign to another is celebrated as 'Sanipeyarchi' festival and is held once in two-and-half years.
Karaikal District Collector Vallavan said the Nalan Theertham tank has been filled with fresh water and more than 10,000 devotees could take a holy dip at a time.Barricades had been erected in the tanks beyond which devotees would not be allowed to take bath. Expert divers would be kept ready for any emergency.
Ninety three digital surveillance cameras had been installed at strategic locations inside and around the temple, he said.