Obviously not the swimming type.

Whats the rules on speedo's as i'm getting slightly confused, i've a stack st500 tacho with speedo built in which i'm hoping to use as a all in one solution

If I set it up so none of the control buttons to change the display are there I take it that it would be ok?

it will be ok as long as the speedo reads at all times. i failed sva with a speedo which could be removed at the push of a button.

cool, another step in the right direction!