"I dived into the remains with an Australian: a shipwreck which may not mean much to us aroused his interest," diving instructor Ercan Zeybek said.
"It was an emotional moment for him."
Access to the wrecks required a special permit until 2017, when Ismail Kaşdemir, who heads the area's Çanakkale Historical Site, began pushing the idea of opening the seabed to the broader public.
"There was history and treasure lying underwater for more than 100 years," he said. "The diving community was curious."
Çanakkale already attracts global tourists intrigued by remnants of the legendary city of Troy, which rests on the Dardanelles' eastern bank.
"You can already smell the history above the water," Derya Can, who has set multiple free-diving records, told AFP at the underwater park's unveiling.
"Now, divers will be able to survey the underwater history."
For film maker Karakas, this history is also personal since his name Savaş (meaning "war" in Turkish) honours the Gallipoli campaign, where his grandfather was wounded.
"His hand was burnt and I was very scared when I was a child. Each time he was trying to touch me... I was looking at his hand and feeling a little bit weird," he recalled.
"When I dive, I remember this hand. The rusted steel feels like the hand burnt by shells from those ships, so it's like holding my grandfather's hand."