It's been a while since I looked it up, and my Jepps are out in the car
, but I'm fairly certain in one paragraph in Dep/App/Ldg Procedures it defines circuit heights.
- Downwind speed < 60kts (i think) = 500' AGL
- Downwind speed 60kts - 120kts = 1000' AGL
- Jets or Higher performance pistons (Downwind speed >120 kts) = 1500' AGL
I do remember in my twin endorsement having to make sure I was below 120 in the circuit if I wanted 1000' circuits.
Also, your downwind spacing should be larger if you're higher, and you should turn base later, as your 45deg / 2 wing chords / whatever measurement you use from the threshold for your base turn, should stay the same, and since you're higher you will be further down downwind when you turn.
Since you turned later, you would have a wider base leg than the 1000', and shouldn't come down on him from above. Just need to keep a good eye out for him on late base / early final (No 'S' ScottyDoo!
)
Arrr!