DUMAGUETE CITY – The Coast Guard District Southern Visayas (CGDSV) has tightened security measures and increased monitoring of yachts in Tambobo Bay, Siaton, Negros Oriental, to prevent unlawful activities, including the smuggling of illegal drugs and other contraband.Commodore Christopher Auro, CGDSV commander, said that security cameras have been installed and Coast Guard personnel deployed at the bay's entrance."The role of the Philippine Coa…