B737 Series use of reverse thrust during landing roll
Re use of reverse thrust in the Boeing 737 series.
Edited for brevity from the FCTM:
"Maintain reverse thrust as required, up to maximum, until the airspeed approaches 60 knots...
...The thrust levers should be positioned to reverse idle by taxi speed then full down after the engines have decelerated to idle. Reverse thrust is reduced to idle between 60 knots and taxi speed to prevent engine exhaust re-ingestion and reduce the risk of FOD.... The PM should call out 60 knots to assist the PF in scheduling reverse thrust."
Question: If landing into a (say) 30 knot HW component, 60 knots IAS means a 30 knot ground speed. The slower the aircraft is on the ground while using high reverse thrust, increases the risk of FOD and engine surge.
Would it therefore be true to say that reverse thrust should be positioned to idle at 60 knots ground speed if landing into wind, rather than 60 knots airspeed?