"We're teaching the brain how to image with sound," Bushway said. "Flash Sonar gives someone more awareness and connection to where they are. To the person, it means the freedom to walk or hike wherever they want to go."
In the organization's 10 years of operation, more than 1,000 students in 15 countries have benefitted from World Access's training courses and activities.
With more courage than your average "sighted" person, World Access coaches lead hiking, mountain biking and other adventurous activities — while all being blind themselves.
The only time they slow down is when well-meaning bystanders try, unnecessarily, to guide them back to safety.
"We have to explain to them, 'We got out here this far, didn't we?'" Bushway said. "But, with some people, it doesn't matter what you say."
On Saturday, Bushway will help lead a three-mile hike through Newport Beach's Upper Back Bay and an introduction to Flash Sonar for about 25 people, he said.
Bushway and the other World Access coaches are just as prepared as any other hiker going into the wilderness in terms of having done his research, packing supplies and a compass, and emergency preparation, he said.
Plus, he can "perceive" the trail, even if he can't actually see it.
"When you're hiking, you're paying attention to the different ruts in the road, where the sun is hitting on your face, and for areas like the Back Bay, you can hear the traffic in the distance," Bushway said. "While you have your cane and can feel the sides of the trail, you can use other senses to preview the trail and know if a tree is farther up."
While World Access primarily teaches the technique to the blind, people with no vision impairments are also invited to slip on a blindfold and join the introductory hike to experience the environment through their other senses.