Trislanders are only used on Guernsey-Dinard, Guernsey-Alderney and Alderney-Southampton routes. But Do.228s are ALSO used, so you really never know which it will be till the day. I've spoken to Aurigny reservations before booking, and invariably they will tell you "Dornier" when you ask which aircraft will operate a specified flight. Most recently I could see that SOME flights would need to be operated by Trislander as the one serviceable Dornier can't do the lot. The person at reservations recognized this when told but admitted that they are "in the dark" just as much as anyone else when it comes to knowing what is actually going on with the Dornier fiasco - two aircraft being out of service long-term.
Recently it was suggested that Trislanders will continue for another five months - so you'll need to get on board before the end of March. However it's anyone's guess as the Trislanders were scheduled for retirement in April 2016 - or even earlier!
