Have just heard from Heidi that the boat is north of the Centennial Bridge; the webcam is here:
http://www.pancanal.com/eng/photo/camera-java.html
(choose the "Centennial Bridge" tab.) The camera is on the east shore of the canal, looking north at the bridge. It's fairly high up above the canal, so the boat is going to be pretty small in the image, but should appear under the bridge and come down the frame towards the camera.