RMS Adriatic (1907)
While not a cruise ship, RMS Adriatic (1907) was the first ship with a swimming bath.
Yes, there was a 6ft deep swimming pool for the first class passengers.
the 1st olympic swimming pool was in 1899.
An ok indoor swimming pool costs about $100 A great indoor swimming pool costs about $1,500 A First Class kind of swimming pool costs about $27,000
Europe
Titanic's pool was located down on F deck. Altho the Adriatic was the first vessel of all to have any swimming pool, the Olympic-Class vessels had the first heated swimming pool for any sailing vessel.
Titanic and her sister ship, Olympic, had a heated swimming pool (the first for any sailing vessel), a squash court (the first for any sailing vessel), and the first elevators for second-class.
1933
The R.M.S. had many luxury items on board. The Titanic not only had the first ever heated swimming pool built on board a ship, it also had squash courts and it's own daily newspaper.
Lido is another word for swimming-pool, so I should think the lido-deck is where the pool is.
'Swimming Pool', sometimes shortened to 'Pool'.
The Olympic-Class vessels (including Titanic) had many special things about them. For example: The first heated swimming pool for any sailing vessel, the first squash court for any sailing vessel, and the first ship w elevators for 2nd class.