Queen Mary's hospital. Titanic's could have looked somewhat hsimilar.
The Hospital of the Titanic was located on D-Deck, at the starboard side close to the Second Class Dining Roomand next to the galleys. It could be accessed through the surgery room on C-Deck, which had a staircase to the hospital below. The hospital on D-Deck was used by the First and Second Class passengers. The surgery room was located at the end of a starboard corridor on C-Deck behind the Aft Grand Staircase and then down. There were four wards and a padded room (the ship's brig), 2 bathrooms, 3 water closets and two infectious disease wards.
Lesson 4 Hospitals, Surgeons, & Disease on Titanic
Picture from a video about a lesson from Titanic University on the hospital.
The Engineering crew had a surgery room of their own, was located on C-Deck under the Forecastle Deck in the bow of the ship. This one had one surgery room and two wards. The Third Class had a dispensary further aft on D Deck. This one had one ward, one surgery room and a waiting room. Mercury would not be used on board.
Dr. O'Loughlin and Dr. Simpson were the two doctors on Titanic. Dr. O'Loughlin was the surgeon whilst Simpson was his assistant surgeon. There was also a hospital attendant, matron, and nurse/stewardess.
O'Loughlin and Baker Joughlin both got liquid refreshment during the sinking. Neither surgeon survived the sinking.
On the Britannic[]
The First, Second, and Third Class hospitals were all merged into one, and is located in the former spot of the Third Class Smoke Room, which was moved up to B-Deck. The Engineering crew hospital was reduced to only a surgery room.