Lee Spencer 'The Rowing Marine' met with Prince Harry ahead of his attempt to set a new record for rowing unaided across the Atlantic.
The marine is planning on rowing from the mainlands of Europe to South America raise awareness for the Endeavour Fund, a charity co-founded by Prince Harry.
He is hoping to beat Stein Hoff's record from 2002.
He rowed the Atlantic in 96 days, 12 hours and 45 minutes.
Mr Spencer made the trip once before a year ago but was rowing alongside three other disabled veterans as part of the Row2Recovery team.
The all amputee four-man team set a record in 2015.
The Rowing Marine spoke to the Prince and said: "When you go outside (leave the military), you think I'm going to miss the lads, miss the laughs, the camaraderie and everything that goes with it. But actually, it's the sense of service, sense of doing something that matters.
"And you allowing me to do this for the Endeavour Fund has allowed me to carry that on."
Harry described Mr Spencer's challenge to raise awareness for the Endeavour Fund meant a "hell of a lot" to other veterans.
He also joked that:
"You've got three less people but you won't have to make conversation"
The Endeavour fund which is fuelled by The Duke and Duchess of Cambridge and Prince Harry aims to help service men and women rediscover their self-belief and fighting spirit through physical challenges.
Mr Spencer served with the Royal Marines for 24 years and did three tours of Afghanistan.
However, his injury was sustained outside of service when he stopped to help a motorist who had crashed on the M3 and was hit by debris.
Images and video courtesy: Endeavour Fund