She arrived in her patrol zone on 17 May and sighted her prey on the 24th .
Surcouf sent Portier to intercept , and Revenant departed Port - Louis on 30 April .
Revenant arrived in Revenant 's patrol zone on 17 May and sighted her prey on the 24th .
Surcouf sent Portier to intercept , and Revenant departed Port - Louis on 30 April .