I
I only occurs in the large arena (20x60 m). I is on the centre line between X and G, in line with S and R.
In the arena
- Letter
Large arena only (20 x 60 m)
Good to know
I lies in line with S and R; together with L it completes the centre line of the large arena to A-D-L-X-I-G-C.
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Sources: Federation Equestre Internationale (FEI) · Equine World UK.