Recommend me a head mounted action video camera

[Dale_tem]

Hi

My dad is off on the Clipper Round the World yacht race and looking for a head mounted video camera he can record his voyage on.

Requirements are...

As weatherproof as can be, especially against salt water

Take SD Cards for storage rather than inbuilt memory.

Any help appreciated

 

[wontolla]

Drift HD Ghost My Son uses one on his sport bike and loves it.
He also has the latest GoPro and reckons the Ghost knocks spots of it.
Takes Micro SD cards to 32mb.