RMS Mooltan is a type of ship that was built a long time ago to help people travel across the ocean. It's like a really big boat with a lot of rooms for people to sleep and eat in.
The name RMS Mooltan stands for Royal Mail Ship Mooltan. This means that it was used to deliver mail from one place to another.
The ship was very special because it had different classes of rooms, like a hotel. There were First Class rooms for rich people who paid a lot of money to travel. They had big beds and nice decorations. Then there were Second Class rooms for people who had a little less money. Finally, there were Third Class rooms for people who didn't have a lot of money.
RMS Mooltan traveled all over the world, from England to Australia and back again. Sometimes it even stopped in other countries along the way.
Unfortunately, RMS Mooltan doesn't exist anymore. It was eventually retired and taken out of service. But we can still learn about it and remember the important role it played in helping people travel and communicate across the oceans.