What is in this image? Describe it as if you were explaining it to someone from the 15th century.

Imagine a large carriage, unlike any horse-drawn cart you''ve known, crafted of metals and unfamiliar materials. It has no beasts to pull it, as it moves by its own mysterious mechanisms. This carriage is particularly designed to rescue people from the ravages of fire. It has a tall, extending ladder mounted atop it, not made from rope or wood, but a sturdy, segmented construction like the mast of a ship, but able to reach much higher, even to the top of great structures. This magical contraption is equipped to carry water in vast quantities, which it can spray to quench towering flames. This device, a marvel of our time, plays a crucial role in safeguarding lives and homes against one of nature’s most fearsome dangers—fire.