Man steps inside world's biggest ship and its engine is so big it feels like a building

When you walk onto the world’s biggest ship, it takes something enormous to put it into perspective – and that’s exactly what this man got when he saw the building-sized engine.

A Second Officer gave viewers a deck-by-deck tour through what he calls the largest marine engine ever constructed.

The moment he stepped into the ship, the scale hit us fast: 14 cylinders that look taller than houses stacked inside a room that feels literally endless.

With the ship alongside in port and the engine shut down, he was able to walk right through the machinery that normally powers the beast.

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The world’s biggest ship engine feels like a building

This cargo ship makes even the most luxurious superyachts look tiny.

This Second Officer decided to take us for a tour of the gigantic cargo ship while the engine and machinery were turned off.

The tour started with a simple room, but it turns out that it was not a separate engine room with a normal motor inside – the engine itself is the space.

From the upper decks, he explained that the ship is around 400 meters long, with the engine positioned near the center.

That layout means the propeller shaft runs an incredible 167 meters, stretching almost like a long underground corridor.

He moved into the Engine Control Room, the nerve center where engineers monitor key parameters on multiple screens and run the ship’s systems through a main console.

Generator controls work alongside emergency systems, fire panels, and monitoring displays that keep the entire ship powered and safe, and if something goes wrong, everything will go very wrong.

Deeper inside, the scale gets even more mind-blowing

He passed store rooms packed with spares, a boiler platform dominated by towering equipment, and a freshwater generator that converts seawater into usable fresh water onboard.

He pointed out that starting air compressors used during engine startup, along with oversized pumps and pipelines, make tracing systems a job in itself.

Near the bottom platforms, he showed ballast water treatment equipment and more pumps before entering the shaft tunnel.

The walk along the propeller shaft shows off how truly huge the world’s biggest ship was from the inside, and he finished the tour praising the engineers who spend long shifts maintaining machinery at this scale.