Chase said it was a nailbiter at the finish line with Imrie leading Nossiter then Brown home.
Also just barely missing out on the top of the podium, by 0.2s, was Under 16 K2 team Cambell Tanner and Regan Davey in the 500m final.
Sapere Simon and Erica Tanner also came second in the Under 18 500m.
"This was a great effort for this duo as this is Simon's first national event and he is still only 15 years old," said Chase.
"Under 14 K2 500m paddlers Jack Clifton and Lucas Thompson did stunningly. The pair are first timers at nationals and as event commentator Ian Ferguson said, "these two have a bright future".
"They are young but have a lot of potential and are a super keen pair of youngsters fully involved in nationals."
Chase said the highlight of Day 1 was watching Olympic gold medallist Lisa Carrington winning the Open K1 500m race.
"Clubs emptying their tents to view the race of the world champion and Olympian. The 'pocket rocket' is without a doubt the reason for the increased participation in the sport."
