She nevertheless managed to surface , but had to be towed to Toulon .
In 1961 , as she served as a target for mock torpedo exercises , Espadon was hit by two inert torpedoes , damaging her propeller .
She managed to surface , but had to be towed to Toulon .
In 1961 , as she served as a target for mock torpedo exercises , Espadon was hit by two inert torpedoes , damaging her propeller .