The sport was evolving and becoming more demanding, with some races now having only 10 people in the boat, rather than 22.
What made their achievements even more impressive was that they were often competing against much younger teams, he said.
"It's always been the focus for us to get health and well-being first and the competition usually comes out of that."
Club chairwoman Kay Wilton, who has been paddling for the team since its conception six years ago, said with paddlers aged between about 32 and 68, the club had shown they could hold their own against their younger competitors.
She credited Mr Karaitiana with leading the club to success again this year.
"If we didn't have his skills, we wouldn't be up to the level we are today."
The club, which has 30 members, is eager to recruit new paddlers and welcomes newcomers of both genders.
The club is having a one month break, with training due to resume in late April/early May.