sentences:  As he searched, two German torpedo boats sailed from Ostend to intercept the cruiser, but in the heavy fog they collided and, disabled, limped back to shore.During this period, Godsal's motor launches lost track of the cruiser in the murk, and it was not until the third pass that "Vindictive" found the entrance, accompanied by only one of the launches.Heading straight into the mouth of the canal, guided by a flare dropped by the launch, "Vindictive" became an instant target of the German batteries and was badly damaged, the shellfire exacerbating the damage suffered in the earlier Zeebrugge Raid and seriously damaging "Vindictive"s port propeller.