Geometric Path Descent on Boeing a/c

[moscho999]

Hello everybody,

operating 737NGs I found out that my company is planning to upgrade the FMC to be capable of a geometric path descent.
According Boeing this change provides commonality with other Boeing Airplane models and allows VNAV to be used for approach operations at non-standard temperatures.

The last part about temperatures is puzzling me a bit. Up to now - w/o the option installed we are already doing VNAV-approaches and for lower temp. than ISA we are correcting the minimum crossing altitudes during final approach.

So, could anybody explain me what the differences are?

Thanks a lot for the help...

Moscho