Review of Viking Osiris deck 1 (Main-Spa)
Crew (service) areas are located aft and forward.
Ship's wellness complex consists of Spa, relaxation lounge, treatment rooms (for massages), Hair Salon
Souvenir / Gift Shop (starboard)
Cruise cabins from 100 to 111 are all in category B (Porthole Window Suites).
One Lift (passenger elevator) connects all cabin decks. All decks are interconnected via stairs (forward, midship, and aft stairways).
The next infographic shows Main Deck's location on the riverboat's deck plan layout.