The Condor Voyager has had its lease extended to cover the 2022 season.
The fast ferry was first introduced last summer as travel restrictions to the Channel Islands were lifted.
The Vogayer came in to replace the Rapide, which was sold to another ferry company in Spain.
Condor Ferries says it took the chance to bring the Voyager in when she was available - and will make changes to it over time.
"One of the key benefits of using Voyager has been the increase in capacity compared to her predecessor, Rapide. Using Voyager and Condor Liberation last Summer with a revised schedule from the UK, has meant we were able to double car and passenger carryings to 400 cars and 1,600 passengers per day to Guernsey and Jersey.
"This has supported the inbound visitor market and also provided travel options for Islanders."
The Voyager will operate out of Normandy from early next year because Condor is moving its French services there from St Malo.
Draft law scraps time limits on abortions in Jersey
Divide over approach to gender guidance in schools
Three charities awarded £500 grants in community campaign
Ministers back principle of social media 'restrictions' for under 16s
Passengers rerouted through Jersey Airport departures
A total ban on disposable vapes in Guernsey and Jersey is poised to take full effect
Islanders with COVID-19 symptoms reminded to avoid the hospital
2025 was the fourth warmest year on record
