More Efficient way of updating data?

Hi All,
I am trying to update a column but this method is very slow if we are dealing with 50k of records.
Is there a better way of doing it?

If ActualV = "Car" Then Range("B" & X).Value = "Yes"
If ActualV = "Plane" Then Range("B" & X).Value = "Yes"
If ActualV = "Motorbike" Then Range("B" & X).Value = "Yes"
If ActualV = "Yacht" Then Range("B" & X).Value = "Yes"
If ActualV = "Trishaw" Then Range("B" & X).Value = "Yes"


Thanks!
Nironto