they are changing quite frequently and there's no realiable source. the most frequent travel books say:
Book 1
Fierza: 8 am (I think that we all agree that this isn't correct, 7 am is more likely)
Koman: 10 am
sometimes two sailings a day
note, that one sailing takes exactly two hours
Book 2
Koman: 10 am + 4 pm from June - September
no details about departure in Fierza - only the note, that one sailing takes 2 hours 10 minutes
Book 3 (a little bit older)
Koman: 10 am + 4 pm
Fierza: around 8 am
Book 4 (a little bit older)
Fierza: 7 am
Koman: between 10 am and 10.30 am
A local said, that the ferry is currently sailing three times a day - also after September.
