Coleraine's Peter Chambers and Englishman Will Fletcher are into the semi-finals of the men's lightweight double sculls.
Holly Nixon, Joel Cassells and Rebecca Shorten have all moved straight into Sunday's finals of their respective boat classes.
Chambers and Fletcher began the quest for a lightweight double sculls European title fresh from their gold medal winning performance in the first World Cup regatta in Belgrade earlier this month.
However they were forced to qualify for Saturday's semi-finals through the repechage after finishing behind Germany in their heat with only the winners progressing directly.
The duo regrouped and in the afternoon session held off the fast finishing Greek boat to take first place.
Ireland's Rio Olympics silver medal winning brothers, Gary and Paul O'Donovan, who are defending their European title won in Brandenburg twelve months ago, had to follow the same path as Chambers and Fletcher.
They were beaten by Poland in their heat but won their repechage ahead of Ukraine.
Enniskillen's Holly Nixon and her team mates Jess Leyden, Bethany Bryan and Mathilda Hodgkins-Byrne moved up from fourth place to second behind the Netherlands to claim an automatic qualifying place in Sunday's women's quadruple sculls final.
With only five entrants in the women's eight an exhibition race took place to decide the lane draw for Sunday's final with Great Britain finishing second behind Romania. The GB crew includes Belfast's Rebecca Shorten who is making her senior international debut.
Likewise Coleraine's Joel Cassells and partner Sam Scrimgeour were fourth in their lightweight pairs exhibition race behind winners Mark O'Donovan and Shane O'Driscoll from Ireland.
Cassells is aiming for a third European gold medal in consecutive years.

The public car park is just off the Upper Newtownards Road, one of the main routes into the city.
Thousands of wooden pallets are now piled up where previously there were parked cars.
The bonfire makers are involved in a dispute with the city council over the storing of pallets.
They say the council collected pallets from the area earlier this year, agreed to store them and return them this month but failed to do so.
Bonfire builder Macauley McKinney, 21, said: "We had an agreement with the council that they were going to store the pallets in a safe place, and now because the agreement was broken, they've let us down."
Belfast City Council is not commenting in detail on the issue, as an investigation has been called into the storing of pallets.
A spokesperson said: "It was agreed at a meeting of Belfast City Council's Strategic Policy and Resources Committee on Friday that an investigation and full review, led by the chief executive with independent input, would be carried out into the issue of collection and storage of bonfire material, and the future approach of bonfires across the city."
The committee's decision needs to be approved at a full council meeting next week.
Traditionally, bonfires are lit in many loyalist areas of Northern Ireland on the "eleventh night" - the eve of the Twelfth of July, an annual celebration to mark William of Orange's victory over King James II at the Battle of the Boyne in 1690.

Boyce, 27, who had a couple of spells with Glentoran, had spent this season on loan at Dungannon Swifts after being put on the transfer list at Coleraine.
Last June, Coleraine boss Oran Kearney said Boyce was not in his plans and the player was not given a squad number.
"We are delighted to get someone of Darren's ability," said Ballymena United manager Glenn Ferguson.
"He will add quality to our front line and score goals."
Earlier this week, Ballymena signed former Linfield defender Jim Ervin, also on a 30-month deal.
United said both players would be eligible to make their Sky Blues debuts in Saturday's Irish Cup fifth round match away to Championship One side H&W Welders.
The match at Tillysburn has a 13:30 GMT kick-off.
Meanwhile, on Thursday night, Linfield midfielder Brian McCaul signed for Glenavon.
McCaul was Linfield's top scorer last season but had not commanded a regular place this term.
He had previously been at Glenavon on loan and has signed an 18-month deal at Mourneview Park.
Four rowers from Northern Ireland in the Great Britain squad have advanced from the heats at the European Championships in Racice, Czech Republic.
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A car park in east Belfast has been closed to the public by young men building bonfires.
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Ballymena have announced the signing of winger Darren Boyce from Coleraine on a two-and-a-half year contract.