Thanks for your comment, I find all this military stuff really interesting since it's very serious stuff so they most likely always have good reasons (like not getting killed or killing your friends) for why they do what they do.

This reminded me of this scene (even though it's not about using "repeat" in the wrong context) https://www.youtube.com/watch?v=B9xg2-6JDL8

and about a section in the book [Chickenhawk](https://en.wikipedia.org/wiki/Chickenhawk_(book)) where the protagonist (Huey transport pilot) is at a artillery site and realizes how everyone is basically fighting their own war.

crypto

The World Wonders (Nimitz's message)

In artillery, "repeat" means "fire again". So the phrase, "Say again, over." is used to clearly request that the RTO (radio telephone operator) did not fully understand the phrase.

So repeat is never used except to have FDC Fire Direction Control "repeat" the same volley of artillery, naval gun, mortar or missile fire. Hence in class when we would fuck up and say, "repeat" the instructor would say, "shot over". Letting us know that munitions were coming again and we might be getting killed. 

Just my two cannons worth of knowledge. 