samsturdy said..
Me and Missus went sailing on the Pittwater yesterday. Good breeze 20+knts and we were flying along (relatively) the breeze was a
Nor-easter and I had started on the Eastern side of Pittwater and had Lion Island on the bow as my destination, so for all intents and
purposes I was heading due North. I thought I could make Lion Island on one tack, but no, for some reason I ended up on the western
side of Pittwater and had to put a tack in to avoid end up in the forest. With Lion Island always on the bow and a breeze that didn't
seem THAT strong how come I got blown sideways so much??. I reckon that although I thought that I was heading North I was actually
heading North-west. Does this happen to you blokes??.
Sam the effect is called leeway. The keel tries to stop the boat slipping sideways, but there is always some leeway when you are beating to windward. So the actual track over the ground is not where the bow is pointing.
The other effect is the tide. At the mouth of Broken Bay the flow can be quite strong. Aways good to check the tides and alllow for the flow. Minimal in Sydney but huge in some places.