<P> This was followed by the unmanned ROVs Kaikō in 1996 and Nereus in 2009 . The first three expeditions directly measured very similar depths of 10,902 to 10,916 m ( 35,768 to 35,814 ft ) . The fourth was made by Canadian film director James Cameron in 2012 . On 26 March , he reached the bottom of the Mariana Trench in the submersible vessel Deepsea Challenger . </P>
<P> This was followed by the unmanned ROVs Kaikō in 1996 and Nereus in 2009 . The first three expeditions directly measured very similar depths of 10,902 to 10,916 m ( 35,768 to 35,814 ft ) . The fourth was made by Canadian film director James Cameron in 2012 . On 26 March , he reached the bottom of the Mariana Trench in the submersible vessel Deepsea Challenger . </P>
who reached the bottom of the mariana trench
who reached the bottom of the mariana trench
Canadian film director James Cameron
Canadian film director James Cameron