SailNet Community - View Single Post - Check my math
Thread: Check my math
View Single Post
Old 06-12-2010
davidpm's Avatar
davidpm davidpm is offline
Senior Member
Join Date: Oct 2007
Location: Madison
Posts: 3,838
Thanks: 207
Thanked 52 Times in 44 Posts
Rep Power: 8
davidpm is on a distinguished road
Check my math

OK here is a typical Long Island Sound situation.

I want to go due west.
The wind is light coming directly from the west.
The current is strong also coming from the west.
I'm sailing some old shoe with blown out sails that on a good day can tack through 100 degrees.
I'm making a blistering 3 knots through the water.

With no current I could tack tack to my destination doing my 100 degree tacks about 50 degrees off the wind.

With the current I've got to steer about 40 degrees up wind which of course I can't do in this situation.

The end result is that the best I can do is north or south and I'll never go west unless the tide turns. Maybe 5 degrees and 185 degrees but not much more.

Is this what you get?
Reply With Quote Share with Facebook