I didn't look at this up till now, with the title I thought it was a steam driven ship.
The locomotive was very impressive for a USA unit, a lot tidier in appearance with a lot less exposed pipework on the outside of the boiler.
It appears this loco was converted to oil fired but was originally coal, an attempt was made in the UK to do this conversion on a British loco but was not successful.
A USA " big boy" locomotive which became a display unit was recovered from a place in California and transported by rail to the Union Pacific HQ in Cheyenne Wyoming to be renovated back to working order. The intention is to convert this to oil fired, will be interesting to see how it works out.
The restoration project will take quite a few years.
The Union Pacific centre is on my bucket list to visit