Duque de Tetuán
... that the Spanish floating battery Duque de Tetuán was considered a failure as a ship of war?
... that the Spanish <a href="./Floating_battery" id="mwBIw" rel="mw:WikiLink" title="Floating battery">floating battery</a> <i id="mwBI0"><b id="mwBI4"><a class="mw-redirect" href="./Spanish_ship_Duque_de_Tetuán_(1874)" id="mwBI8" rel="mw:WikiLink" title="Spanish ship Duque de Tetuán (1874)">Duque de Tetuán</a></b></i> <i id="mwBJA">(pictured)</i> was considered a failure as a ship of war?