On Tue, 02 Sep 2008 01:22:27 -0500, Geoff wrote:

Is there
an advantage or disadvantage to having jet engines?
You mean jet drive, not engine. Engines burn fuel, drives move water.
The big advantage is shallow draft and nothing dangling down to hit
tree stumps and rocks. Disadvantage, historically, is bad fuel
economy, as much as 30% less mileage. The latest ones are better that
way.

Casady