Secured By Lean Daval Jr. - May 9, 2017 9:00 am SECURED. Security forces belonging to the Philippine Navy conduct a routine sea patrol between Davao City and Island Garden City of Samal (IGaCoS) on Sunday. The Philippine Navy is among the agencies that provided security as the Department of Tourism (DOT) 11, local government unit of IGaCoS and private sector held tourism-related summer activities in the island. LEAN DAVAL JR.