Change and survival of buoys underwater signaling in Buenaventura, San Andres, Providencia, and Cartagena. Other Cambio y reflote de boyas sumergidas de señalización en Buenaventura, San Andrés, Providencia y Cartagena. Skills Posted on July 22, 2019 ← Inspections narcotics to merchant ships that go out to the outside from the Colombian ports. Diver and supervisor of the first signaling maritime port of the island of San Andrés and Providencia. →