I've just made the mistake of consulting Wikipedia to check that my understanding of what a Rate 1 turn (which I'd always thought was 3 degrees per second) is correct.
"The aviation term ROT stands for rate one turn, also known as a standard rate turn. All aircraft must be able to perform a standard rate turn.
A standard rate turn for (light) airplanes is defined as a 3° per second turn, which completes a 360° turn in 2 minutes. This is known as a 2-minute turn, or rate one (= 180°/minute).
For heavy airplanes a standard rate turn is a 4-minute turn."
http://en.wikipedia.org/wiki/ROT_(aviation)
Any comments ? Am I expecting too much of Wikipedia ?