ON 25/AUG/42, THREE DAYS FOLLOWING BRAZILIAN DECLARATION OF WAR, THE SOUTHERN NAVAL FORCE WAS CREATED. INITIALLY DENOMINATED SOUTHERN PATROL GROUP, IT INCORPORATED THE OLD TORPEDO BOATS SANTA CATARINA, RIO GRANDE DO NORTE, SERGIPE, PARAHYBA, MARANHĂO, MATO GROSSO, PIAHUY AND SURVEY VESSEL JACEGUAI.