When a change is released and sent for confirmation to the crewmember, they receive a notification with the changes. This can be seen from the My Revision tab.
The notification they receive shows them the previous state of the roster and the actual revision.
When you click the Confirm button, the changes become officially confirmed in N-OC.
Note: From N-OC Web, you can setup a parameter that prevents the crewmember from seeing the roster before confirming any changes. By doing so, the crewmembers has to confirm revisions before seeing the roster in N-OC Mobile. You can find this in Setup > ‘CrewForceDialogue’.