I probably get asked about monitors more than any other question. I've had it come up in questions at least three times in the last month including an operator asking, "Why don't you have a monitor?" (my answer, "Because I don't need one.") I've written about this before and it is always a source of some argument among dolly grips.
The generation of dolly grips I came up with are the last to work before the advent of personal monitors. I held overs and did moves for years before we had them. I still remember the first time I saw an onboard monitor. I was amazed. Before them, we simply learned to form a general picture in our heads of what the camera was seeing; a sort of sixth sense, if you will. This sense in conjunction with subtle signals from the operator is what allowed dolly grips to deliver amazing shots without a monitor for years. And having it will make you a better dolly grip whether you use a monitor or not. Now there is nothing wrong with monitors. They are a tool. I use them. But I limit their use to mostly holding overs and shots where I have to thread the camera through heavy foreground and the like. There is nothing inherently wrong with them. But you can get dependent on them and if you spend all day staring at a monitor as you do your work you will fail to develop this sixth sense. You won't be as good. You will miss subtle cues from the actors and lose where you are in the space of the set. I've heard of dolly grips staring at the screen so intently during a simple lateral dolly that they run off the track. Don't be that guy. Take the time and challenge yourself to develop a sense of where the camera should be without the monitor. You will appreciate your skills much more.
The Captain has spoken.