The Goeree Gat

After looking at the island of Goeree in Google Maps, I still wonder which side is the "Goeree Gat" mentioned in The First Dutch Wars volumes. Also, after the Zeeslag bij Nieuwpoort (the Battle of the Gabbard), a few ships sought shelter at Goeree. Were they in the water immediately to the north or to the south of the island? Does someone know? Google Maps is useful from my desk at work, but Google Earth really gives you the capability to see what an area is like, with the ability to view from an angle above the earth, or even down to the water level.