Mark XIV bomb sight
... that the disastrous Air Battle of Heligoland Bight in 1939 led to the development of the fast-acting computerized Mark XIV bomb sight?
... that the disastrous <a href="./Battle_of_the_Heligoland_Bight_(1939)" id="mwBIw" rel="mw:WikiLink" title="Battle of the Heligoland Bight (1939)">Air Battle of Heligoland Bight</a> in 1939 led to the development of the fast-acting computerized <b id="mwBI0"><a href="./Mark_XIV_bomb_sight" id="mwBI4" rel="mw:WikiLink" title="Mark XIV bomb sight">Mark XIV bomb sight</a></b>?