Nine days later , 91 F , 94 F and 98 M were chased .
Nine days later , 91 F , 94 F and 98 M were engaged by Italian torpedo boats off Pola , resulting in splinter damage to one of the Italian boats .
Nine days later , 91 F , 94 F and 98 M were chased and engaged by Italian torpedo boats off Pola , resulting in splinter damage to one of the Italian boats .