She was repeatedly stopped in mid-Atlantic by German submarines and US Navy and Royal Navy ships for inspections .
From August 1940 Serpa Pinto began her service on the transatlantic routes between Rio de Janeiro and North America ( Philadelphia and New York ) .
Serpa Pinto was repeatedly stopped in mid-Atlantic by German submarines and US Navy and Royal Navy ships for inspections .
From August 1940 Serpa Pinto began her service on the transatlantic routes between Rio de Janeiro and North America ( Philadelphia and New York ) .