of National Geographic Endurance deck 4 (Fore)
- Doctor's Office (Infirmary with full-time doctor)
- Cruise cabins from 406 to 427, all of which Oceanview Staterooms in categories 1 and 2, each with two large windows (non-opening portholes).
- Aft are located all the ship's staff and crew cabins and the crew dining-lounge venue (mess hall).
- All decks are connected via 2 elevators (passenger lifts) and 3 staircases and have public restrooms.