sentences:  "E19" was probably the first of the "E"-class to be fitted with a deck gun during construction, in this instance, possibly uniquely, with only a 2-pounder, forward of the conning tower.She had five 18 inch (450 mm) torpedo tubes, two in the bow, one either side amidships, and one in the stern; a total of 10 torpedoes were carried.E-Class submarines had wireless systems with power ratings; in some submarines, these were later upgraded to systems by removing a midship torpedo tube.