General Santos International Airport, also known as Tambler Airport (RPMR), is the largest airport on the island of Mindanao serving the greater area of Soccsksargen (South Cotabato, Cotabato, Sultan Kudarat, Sarangani and General Santos). Despite being known as a nearby alternate airport of Davao International Airport, General Santos is officially classified as an International Airport. General Santos City is the largest producer of sashimi-grade tuna in the Philippines, thus, rightfully so was... General Santos International Airport, also known as Tambler Airport (RPMR), is the largest airport on the island of Mindanao serving the greater area of Soccsksargen (South Cotabato, Cotabato, Sultan Kudarat, Sarangani and General Santos). Despite being known as a nearby alternate airport of Davao International Airport, General Santos is officially classified as an International Airport. General Santos City is the largest producer of sashimi-grade tuna in the Philippines, thus, rightfully so was nicknamed the "Tuna Capital of the Philippines".