Complex sentence: Her first transatlantic voyage was to Cape Verde with a cargo of food and clothing, upon reaching the islands, Captain Henrique Mendes registered the schooner in Cape Verde, changed her name to "Ernestina" after his own daughter and used her in inter-island trade.
Split into simpler sentences: Her first transatlantic voyage was to Cape Verde with a cargo of food and clothing. Upon reaching the islands, Captain Henrique Mendes reregistered the schooner under the name "Ernestina", after his own daughter, and used her in inter-island trade.