Ключевые слова: army, atlantic, battle, boat, celebrate, city, day, dock, docks, douro, force, frigate, guard, harbor, harbour, history, large, marine, maritime, may 20, military, nautical, navy, navy day, ocean, port, porto, portugal, portuguese, portuguese navy, reconstruction, rescue, river, sagres, sail, sea, ship, ship sagres, shipping, sky, summer, sun, tourism, training, transport, transportation, travel, vessel, water, weapon,