depending on the day and traffic conditions, this bus line stops at the entrance to the marambaia, another beach within a military area and not accessible without special permit. 

from the marambaia, the walk to the praia da barra de guaratiba is about 10 minutes.

bus schedules are subject to frequent changes, and there may be new routes offered at any time, so it is always best to consult with a local guide or hotel concierge to confirm details in advance.