Table:
text: Moby Lines
Current fleet
Current fleet
Ship Built Entered_service Route Gross_tonnage Length_ Width Passengers Vessels Knots
MS Bastia 1974 1974 Santa Teresa di Gallura — Bonifacio GT 75 m 13 m 400 100 18
MS Giraglia 1981 1981 Piombino - Cavo ( Elba Island ) GT 75 m 13 m 400 100 18
MS Moby Ale 1969 1990 Piombino — Portoferraio GT 93 m 16 m 800 160 195
MS Moby Vincent 1974 1990 Livorno—Bastia GT 120 m 22 m 1.600 570 175
MS Moby Fantasy 1976 1992 disarmed GT 142 m 22 m 1.200 400 17
MS Moby Baby 1966 1996 Piombino—Portoferraio GT 101 m 18 m 1.100 100 19

Question: How many knots was the Ms Moby Vincent when the passengers were less than 1.6 for Moby Lines?