And rather than messing about on the genteel River Thames, these serving and ex-British army soldiers are battling the fiercest of elements as they attempt to row -- unsupported -- across the Atlantic Ocean.
That's 3,000 nautical miles of choppy water, burning heat and sore, sore muscles.
While mixed teams of able-bodied and amputee rowers have tackled the crossing before, this is the first time an all-amputee crew
has attempted the challenge, known as "the world's toughest rowing race."
Any contact with the support yacht and they will be immediately disqualified. The other 28 competing crews are able-bodied.
The team's captain Cayle Royce lost both his legs and several fingers in an explosion while serving in Afghanistan's Helmand province in 2012. The bomb blast also broke his neck in three places, bruised his lungs and punctured his heart, putting him in a coma for over a month.
"When you see the state of yourself you think, 'Wow, this is a huge change'," Royce, a keen sailor, tells CNN. "You feel like nobody's going to want you around."
A good friend visited him in hospital. "He said, 'Don't worry, we'll get you sailing again.' I thought it would be a 100-foot (30-meter) Swan (yacht) with gin and tonics and pretty girls," he laughs.
Instead Royce, who still serves in the British Army as a Light Dragoon Lance Corporal, was invited to take part in the 2013-14 Atlantic Row as part of a mixed crew of two amputee and two able-bodied soldiers.
Just 18 months after his life-changing injury, his team came third, beating 13 able-bodied crews.
That experience puts Royce in an ideal position to steer his men through the grueling conditions ahead. Leaving from the Canary Islands, they will row two on, two off, nonstop in two-hour shifts for 40-60 days until they reach Caribbean shores in Antigua.
In their two-hour "break," the rowers need to feed themselves, clean themselves -- with baby wipes to save water -- repair the boat, navigate and blog, using solar-charged waterproof laptops.