Swimming at night brought “intense moments”, he said.
“The support boat was just off to the side… I was laid on my back looking straight up at the sky. You got the whole deal, the whole shebang.
“You’re far away from light pollution and have the whole night sky in front of you.
“It gave me something to think about and took my mind off the pain and aches. It was amazing.”
His team secured necessary permissions to make the crossing at the “eleventh hour”.
“Everyone was very tense,” Bushby recalled. “I was mentally preparing myself to knuckle down for another hard fight. It all happened very quickly. Before I knew it, I was in the water.”
Bushby has covered more than 30,000 miles (48,000km), including 29 countries.
He walked the length of South America, crossed the treacherous Darien Gap and continued north to Alaska.
From there he crossed the Bering Strait on foot, swimming where necessary.