How to Mark a Gun Sight

We knew what the range of them of them was and we just climb out of the range of 50-7. The shells there'd be six position and they'd all open up in a long stream of tracers. When you go to mark a target do you have to go into that range or can you mark it from outside? Oh no you You got to get in there now. Every damn gunner knows that if the first thing they do if Missy marks them they're dead. There's about four or five seconds where there's no lead requirement because he's coming down the shoot right at you.