Which CES should a GMDSS Radio Operator select if the vessel is off the Western Coast of Australia to update a Distress alert message?

Correct Answer: Option B — Perth

Perth is the designated Inmarsat Coast Earth Station (CES) serving the Indian Ocean Region (IOR). Vessels operating off the Western Coast of Australia utilize this station for satellite communications, including distress alert updates, as it provides the necessary coverage and connectivity for that specific maritime satellite footprint.