Final answer:
EUs should continue with the observation using the available back-up equipment and methods if the AMOS sensors are not operational or cannot be augmented.
Step-by-step explanation:
If the AMOS sensors are not operating or there is no interface available to augment the AMOS, the EUs should continue with the observation using the available back-up equipment and methods.
This approach ensures that the observation can still be completed despite the failure or lack of enhancement capability of the primary system. It is important for EUs to be prepared to adapt to such situations by having back-up equipment and methods ready to deploy at a moment's notice.