Underwater robotics expert reveals ‘shipwreck city’hiding beneath major urban lake

Nearly half of the mapped targets in Lake Union are believed to be shipwrecks, though many have not yet been visually confirmed or explored by divers.(shipwreckcity.org)

“It’s crazy that there’s so much down there,” he added, according to KING 5.“It’s shocking to me.Iwas stunned.Looking at these maps — it’s shipwreck city.”

� work he is now taking on.

MAN FISHING WITH GRANDSON UNCOVERS MYSTERY WRECKAGE IN MUD FLATS, ARCHAEOLOGISTS INVESTIGATING

Parisi and his team use GPS to get close to targets, then rely on sonar to locate them in low-visibility waters.

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“Flying blind throughmurky, low-visibility watersis difficult, so we rely on ROV-mounted sonars to ‘see’ and determine the target’s relative position,” he said.

“Many wrecks are tucked underneath, and some marina owners are reluctant to let us film beneath their docks.”

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“Then, we descend to the bottom and fly toward the sonar signature until the target appears on the live ROV camera.”

Because of pollution in Lake Union, Parisi said his team relies on ROVs rather than scuba divers.

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Identifying details on submerged vessels are often obscured by biofouling, rust and environmental degradation, making documentation difficult.(shipwreckcity.org)

“Many wrecks are tucked underneath, and some marina owners are reluctant to let us film beneath their docks,” he said.

“Additionally, when we do arriveat a wreck, gathering identifying information can be extremely difficult.Biofouling, rust, poor public anchoring techniques and other environmental degradation often shed registration stickers, obscure painted hull names, and cause wrecks to collapse.”

the Puget Sound, meaning lake goers are a stone’s throw from the sunken maritime history yet are often unaware,” said Parisi.

“Every place holds incredible landmarks and hidden treasures, yet we’re often distracted by the humdrum of life.”

“Secondly, documentation or footage is missing for over half of the nearly 100 targets in the lake, leaving a huge gap in our understanding of what’s down there.”

Parisi said the work isn’t a new discovery, but builds on earlier sonar surveys and dive records that mapped the sites.

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He also stressed the importance of local exploration, saying he wants Americans “to be excited about what’s in their own backyard.”

“We need to document what these wrecks look like today,” Parisi said, describing the ongoing effort to capture current conditions of submerged vessels.(shipwreckcity.org)

“Every place holds incredible landmarks andhidden treasures, yet we’re often distracted by the humdrum of life,” said Parisi.

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“When you get the chance, allow curiosity to take over and do a deep dive into your local city or town’s history — it is amazing what happened not so long ago, and it never disappoints!”