However Fast the Cabin Gets Washed, First Ask Who's Waiting During Those Two Days of Replacement

Looking at this Shihe internal cabin cleaning robot, the first thing I calculate is whose time it saves—the wall-climbing part is secondary.

The materials say it can clean over 900 square meters per hour, finishing one ship cabin in three hours. This number does match the demand on bulk carriers. What shipowners find most painful is changing cargo—last trip carried coal, next trip needs to load grain, and the cabin walls must be cleaned before loading. Every day stopped, the ship burns a day's money. So the real value of this thing is in downtime, and cleaning thoroughly is just a byproduct.

But I'm thinking about the other side. The fact that it can handle both forward and reverse folded corners and inverted overhead angles shows that real effort went into adhesion and obstacle crossing. This kind of work is done by people suspended on ropes inside the cabin—slow and dangerous. However, in my years of doing warehouse robots, what I fear most is beautiful specs and fumbling on site. A ship cabin is not a standard factory building—rust, residue, structural differences—every ship is different. The manufacturer claims over 95% coverage; I suspect that was measured in some standardized cabin type.

So my suggestion is: if you're selling this, don't just sell the machine—on-site commissioning and operation training need to be bundled as a service. Shipyards and shipowners don't have their own robot engineers, and can't afford to wait when equipment breaks down.

As for buying versus renting, it depends on fleet size and cargo change frequency. If the scale is sufficient and changes are frequent, worth trying; for sporadic use on a single ship, renting is more cost-effective than buying.