[TML] Cargo Airships

[Jerry W Barrington]

On 10/11/07 10:37 AM, Bruce Johnson wrote:

> Almost ALL economic activity on land above the Arctic Circle takes
> place during the winter, the only time the permafrost allows
> operations, otherwise you're bogged down in a sea of mud; and ripping
> up the permafrost during the warm season only makes things worse.

Point of order:

Permafrost, by definition, is the stuff that's *always* frozen.

The summer sea of mud, would therefore *not* be permafrost.

But yeah, terminology aside, I see what you mean.