<p>
	<span id="result_box" lang="fr"><span>Le chronom&egrave;tre</span> <span>du grec &quot;</span><span>chronos</span><span>&quot;</span> <span>(</span><span>temps</span><span>) et le</span> <span>latin &quot;metrum&quot;</span><span>(</span><span> mesurer),</span> <span>est</span> <span>un instrument de navigation</span> <span>utilis&eacute;</span> <span>pour d&eacute;terminer la longitude</span><span>.</span> <span>Il a &eacute;t&eacute; invent&eacute;</span> <span>au d&eacute;but du 18&egrave;me si&egrave;cle </span><span>et</span> <span>&eacute;tait essentiel</span> <span>&agrave; la navigation</span> <span>jusqu&#39;&agrave;</span> l&#39;invention de la <span>radiot&eacute;l&eacute;graphie</span> <span>au 20&egrave;me si&egrave;cle</span><span>.</span> <span>Malgr&eacute; l&#39;utilisation du</span> <span>GSN-</span><span>GPS</span> depuis la fin du 20&egrave;me si&egrave;cle, <span>sa pr&eacute;sence</span> <span>&agrave; bord</span> <span>est toujours</span> <span>obligatoire.</span><br />
	<span>Le chronom&egrave;tre</span> <span>du19</span>&egrave;me si&egrave;cle <span>dans son boitier</span> <span>rond en laiton</span> <span>et sa bo&icirc;te</span> en <span>acajou</span> <span>est tr&egrave;s pris&eacute;</span> <span>par les collectionneurs.</span></span></p>