While The Kerberos and Prometheus are based of famed steam ships such as the sisters Lusitania & Mauritania, and sisters Olympic & Titanic, they are too large to be historically accurate for the late 19th Century. Ships the size of the Cunard & White Star Lines listed above were much smaller and did not reach these proportions until 1907.
In multiple Maura's eyes close-up shots after waking up, there's a camera reflection in the pupils.