Harry.
You can deactivate the ROW/ROP/BTV system. If the OANS (the airport map that appears and replaces the ND) shows the runway length to be different from the charted runway length on the approach plate by more than 35m then you should "consider" pulling the reset button on the overhead panel as part of your approach preparation for BTV can't be used. It's FCOM SOP to consider this.
The lengths should be checked by each crew before descent otherwise ROW/ROP warnings will be received on finals resulting in unnecessary GA's
Hope this helps.
Last edited by Craggenmore; 28th Mar 2016 at 04:09.
Reason: Spelling