Page 48: of Marine Technology Magazine (October 2015)

ROV Technology Interview Case Study

H-1750 USV Mission:

Survey USS Arizona and USS Utah

Deep Ocean Engineering Inc.’s Unmanned Surface Vehicle, H-1750, was selected to survey the historic USS Arizona and the USS Utah at Pearl Harbor, Hawaii

Deep Ocean Engineering participated in the ? rst comprehen- sive multibeam survey of the USS Arizona and the USS Utah at the World War II Valor in the Paci? c National Monument in Pearl Harbor, Hawaii. During a week in October 2014, team members from Deep Ocean Engineering, Inc, R2Sonic,

Autodesk, and eTrac traveled to Oahu to conduct these sur- veys as a gift to the National Park Service.

In the months leading up to this survey, R2Sonic contacted

Deep Ocean to use its their H-1750 USV as an unmanned platform to operate their SONIC 2020 multibeam. Typi- cally, these surveys are completed using a 2-3 manned vessel with an af? xed multibeam but the survey site above the USS

Arizona has a height restriction where a manned vessel can- not navigate. The memorial building that straddles the USS

Arizona makes for a low ceiling above the water at various tides. Couple that with the shallow depth of water above the sunken ship and there is a very tight set of survey vehicle characteristics that must be met.

The survey’s goals were reached and 100% high resolution sonar coverage was obtained of both sunken warships to re- place the artists’ rendition surveys from some 30 years prior.

This will yield high quality measurements of the ship that can be repeated over time and from there, changes such as shifting, settling, and coral growth can be evaluated, some- thing that was absent from the surveys from 30 years ago.

Not only will it provide a long term monitoring baseline, but a 3D scale model of the USS Arizona will be created and used for display purposes at the memorial site.

Pictured, from top to bottom:

The H-1750 USV’s shallow drafting and maneuverability made it a suitable ? t for the shallow waters above the (Photo: AJ Cecchettini) sunken warship USS Arizona.

The H-1750 USV was able to be easily transported to

Ford Island in the back of a small truck to continue run- ning surveys at the partially submerged USS Utah. (Photo: Shaan Hurley)

The low ceiling of the USS Arizona Memorial building made the H-1750 a well-suited for this survey. (Photo: TJ Kneale)

October 2015 48

MTR

MTR #8 (34-49).indd 48 9/29/2015 3:01:59 PM