B737900er
Icao/Pans -ops we fly 4.2nm for 180kts or 5.28 at 205 knots.
Really? I think you have misunderstood the PANS OPS. It gives the limit of visual manoeuvring area available. Why would you place yourself at the edge of the area? Even if you did turn downwind at 205kts it will place you 2.34nm on downwind.