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Figure 7.

The author, Kevin Hardy, lifts the single sphere hadal lander, DOV Mary Carol, with one hand onto the ship after a test dive off San Diego in 2002. DOV Mary Carol later dove both the

Puerto Rico Trench and Aleutian Trench. was to leave the 17” OD the same, but make the ID smaller, creating a thicker wall. We discussed modi? cations to the tooling. The thick-wall glass spheres, serving as both ? ota- tion and as a housing, would be capable of reaching the ? oor of the deepest ocean trench. With funding from Japan, whose researchers wanted to study the deeper waters of the western

Paci? c, NMS completed the development. Exploration of the ultra-deep sea changed dramatically after that.

Ocean Landers inspire such invention. Come along on the journey.

References: Copies of the Ewing & Vine (1938), Snodgrass (1968), and other papers are available for download at https:// www.globaloceandesign.com/other-lander-reference- papers.html.

Post-script: I am grateful to MTR Editor Greg Trauthwein for his invitation to write this column. I am, in perhaps my favorite self-image, an educator. There is enough material to continue the column for some time, and perhaps, in the end, bind the articles into a Handbook of Ocean Lander Design.

We imagine supplementing the articles with video “How to’s”, and share some drawings of useful lander lab gear.

We’ll share experiences and designs from other Landerians from around the world, and suggest Yet-To-Be-Done ideas waiting their turn.

I look forward to receiving your comments, suggestions, and most importantly, your contributions to future articles.

Please send your thoughts and photos to me at: Kevin Hardy [email protected].

Photo by Dr. Art Yayanos, Scripps Institution of Oceanography/UCS www.marinetechnologynews.com 47

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