Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. It only takes a minute to sign up.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Why would a pilot write on the cockpit window like this?
If you use a grease pencil, it rubs off easily from glass
So you can save paper, not have to look down or hunt for the info, it won't fall on the floor, and if it's written in the center of the windshield, both pilots can see it
Required, but never shown