Deck 4 has the ship’s Medical Centre (forward location). This the Aria ship’s hospital operated by resident doctors and nurses on 24-hour duty. Payments are made by the P&O Cruises boarding pass (treatments equivalent to a private doctor’s visit). General and Australia health insurance policies do not apply, so buying cruise health insurance is recommended.
Next are Deck 4 cruise cabins (numbers from 4001 to 4235), of which Outside / Oceanview rooms (categories OB/mid-ship, OE/aft, OG, OI and OP/forward, with Porthole windows) and Inside cabins (categories IB/mid-ship, and IF/forward & aft).