The Duke of Cambridge has said he hopes Prince George will take up scuba diving, as he became president of the activity's governing body.
William h as become the third generation of the monarchy to take the helm of the British Sub-Aqua Club (Bsac).
George may only be nine months old but his proud father would like to see him in the future experience the "wonders" of snorkelling and scuba diving.
The Duke has followed in the footsteps of his father, the Prince of Wales, and grandfather, the Duke of Edinburgh, by taking on the role.
He marked his new presidency by writing a foreword for Scuba, the organisation's magazine: "Just like my grandfather and my father, I am proud to say that I learnt to dive with Bsac, and share your passion for the sport and the underwater world.
"I hope that one day my son, George, will also experience the wonders that snorkelling and scuba diving have to offer."
He stressed he was keen to continue his father's determination to preserve and protect the marine environment, wildlife and heritage.
The Duke added: "The underwater world truly captures the imagination and broadens horizons. I have been fortunate enough to have dived in some stunning locations around the world.
"Scuba diving really has opened my eyes not only to many extraordinary sights, but also to the responsibilities that we have as guardians of the underwater world.
"Which is why, as Bsac's new president, I hope to continue my father's legacy of striving to preserve and protect our precious marine heritage and environment for future generations."
William also spoke of his own goal as the new Bsac president: "I look forward to working with Bsac to encourage even more young people into the sport, for they are the next generation of underwater explorers, pioneers and protectors.
"The skills and experiences gained through snorkelling and scuba diving can have a positive and lasting impact on their lives, giving them confidence and building their aspirations."
The organisation is made up of 120 dive centres and 1,000 plus family friendly and sociable clubs, run by volunteers, up and down the country and abroad.
It represents more than 30,000 scuba divers and snorkellers and welcomes new members from complete beginners upwards including those who have trained with other agencies.
Bsac chairman Clare Peddie said: "This is a very proud moment in Bsac's history to welcome the Duke of Cambridge after his father and grandfather before him.
"It comes just after Bsac's diamond jubilee and having the Duke at the helm of our organisation as we move into a new era is a huge and special privilege.
"It is also a chance for us to say thank you to his father, the Prince of Wales, for the four decades of committed service he has given to Bsac."