Navigation links

I'm swamped today so I'll have to post and run. All the stuff I learned in high school history about ship navigation has been zapped from my mind, so I'll just share some links I discovered through some of my research for the novel:

• 1700s Navigation Basics
• A Short Guide to Celestial Navigation
• Celestial Navigation Net
• Piece of Eight - 17th Century Navigation
• Time & Navigation - John Harrison's Timepiece