Sometimes the FV is the same as the recoverable value, but not always. For example, you have a car and its FV is 100.
Recoverable value is the highest of NRV and VIU So, if your car’s FV is 100, and the costs to sell this car is 3, then your NRV=100-3=97, you see the difference now?
VIU is the future value discounted to the present.