wrote:
I've put some pictures on my tripod web site at

http://lantaisland.tripod.com

Suppose I buy a 46' Tayana sailboat with a 6-foot draft
and sail her from San Diego to this island in Thailand
how close do you think I'll be able to get to this piece of
property ?
You need to look at a chart.

Does the color of the water indicate that it's too shallow ?
I'm also thinking about building a wooden pier for docking
my boat but wouldn't want to do this if it has to be very long.

You can't tell depth by colour, look at a chart.

Or maybe I should get a catamaran instead.

Is it possible for a very strong gust of wind to capsize
a catamaran in the middle of the Pacific ocean at a time
when there's no tropical storm ?
Yes. Experience counts.