there are four international ports: mindelo, são vicente; praia, santiago; palmeira, sal; and sal rei, boa vista. mindelo on são vicente is the main port for cruise liners and the terminus for the ferry service to santo antão. praia on santiago is a main hub for local ferry services to other islands. palmeira on sal supplies fuel for the main airport on the island, amílcar cabral international airport, and is important for the hotel construction taking place on the island. porto novo on santo antão is the only source for imports and exports of produce from the island as well as passenger traffic since the closure of the airstrip at ponta do sol.