The boat stops when the word is said, just a tad before the bridge. The sail wouldn't have fit under, in any case, although with the speed it was going, the mainmast could have snapped in two. It's all a moot point as Acquaire guides the boat to the small stand of shore.
Actions?Hit points and marching orderGrimes 26/58
--Dandy 33/33 < Bless, Hold Person, Find Traps, Silence 15'r, Glyph of Warding, Remove Curse, Dispel Magic, Speak With the Dead, Protection from Evil 10' radius, Lower water >
Castinus 34/34
--Furuk 48/59
Dieter 31/31 < Magic Missile x 3, Sleep, Levitate, Phantasmal force, Stinking cloud, Lightning bolt x 2, Water breathing, Evard's black tentacles, Dimension door >
--Acquaire