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    The Java Trench was surveyed with a Kongsberg EM 124 gondola-mounted to the hull of the 225-foot DSSV Pressure Drop. The survey was conducted over the course of two weeks – March 26th – April 9th, 2019. The data meet the requirements for IHO Special Order standards.

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    The Molloy Hole was surveyed with a Kongsberg EM 124 gondola-mounted to the hull of the 225-foot DSSV Pressure Drop. The survey was conducted over the course of three days – August 24-26, 2019. The data meet the requirements for IHO Order 1 standards.

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    The Mariana Trench was surveyed with a Kongsberg EM 124 gondola-mounted to the hull of the 225-foot DSSV Pressure Drop. The survey was conducted over the course of two weeks – April 19th – May 6th, 2019. The data meet the requirements for IHO Special Order standards.