Comparative fuel trials begin between <a href="https://en.wikipedia.org/wiki/Warship" id="mwVw" rel="mw:WikiLink" title="Warship">warships</a> <a about="#mwt34" data-mw='{"parts":[{"template":{"target":{"wt":"HMS","href":"./Template:HMS"},"params":{"1":{"wt":"Spiteful"},"2":{"wt":"1899"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/HMS_Spiteful_(1899)" id="mwWA" rel="mw:WikiLink" title="HMS Spiteful (1899)" typeof="mw:Transclusion">HMS<span typeof="mw:Entity"> </span><i>Spiteful</i></a> and <a about="#mwt35" data-mw='{"parts":[{"template":{"target":{"wt":"HMS","href":"./Template:HMS"},"params":{"1":{"wt":"Peterel"},"2":{"wt":"1899"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/HMS_Peterel_(1899)" id="mwWQ" rel="mw:WikiLink" title="HMS Peterel (1899)" typeof="mw:Transclusion">HMS<span typeof="mw:Entity"> </span><i>Peterel</i></a>: <i id="mwWg">Spiteful</i> was the first warship powered solely by <a href="https://en.wikipedia.org/wiki/Fuel_oil" id="mwWw" rel="mw:WikiLink" title="Fuel oil">fuel oil</a>, and the trials led to the obsolescence of coal in ships of the <a href="https://en.wikipedia.org/wiki/Royal_Navy" id="mwXA" rel="mw:WikiLink" title="Royal Navy">Royal Navy</a>.