The rotating window on the ship's bridge can be replaced by a wiper, but it must be treated differently. Some ships are not suitable.
Ships sail on rivers and seas. Different regions and different weather conditions occur, which will bring more or less inconvenience to navigation safety. Among them, natural factors such as fog, rain, wind, etc. have a greater impact. Regarding the visibility of ships, in addition to fog, rain has a greater impact. Especially in some thunderstorms, the navigation risk factor of ships increases.
In the past, a classmate of mine worked on the inland river of the Yangtze River. The ship they were on was a hazardous chemical ship and was equipped with such a wiper. Whenever it encounters heavy rain, turn on the wipers to maintain the normal lookout of the ship and ensure safe navigation. The working effect of the wipers has a certain relationship with the amount of rain in the weather, especially moderate rain, which has the greatest impact on the outlook. The reason, I think, is that the amount of precipitation that fell came into contact with some impurities on the glass, causing blurry vision. A large amount of water can directly wash away these impurities, leaving two relatively clear areas of sight on the glass every time the wiper passes.
The classmate also talked about another interesting thing about this issue. Once they went to a small river in the Yangtze River to play, and they took a small passenger ship. The weather was unfavorable, and it started to rain not long after they set off. It was getting worse and worse. After a while, the sound of rain fell into everyone's ears. Compared with large ships, the equipment and navigation aids of these small ships are much simpler. In the face of increasingly heavy rain, the glass in front of the driving window is becoming increasingly blurred, which has begun to affect the outlook. At this time, a person on duty picked up a basin, took a basin of water and rushed towards the glass. The originally blurry glass became much clearer in an instant due to the impact of external force. Along the way, thanks to this artificial "wiper" effect, the ship arrived safely at its destination.
Whether it is a mechanical wiper or a manual wiper, these actions are for the safety of the ship's navigation. The wisdom of sailors is everywhere.