Rickochet Every course I play has the 200, 150, & 100 markers clearly visible on every hole. They also have distances marked on sprinkler heads, esp. on the Par 5 holes.
I do have cheapy GPS and it is fairly accurate when I've compared it to other people's rangefinders. BUT, and I don't know if it is because of the type of work I've always done, I've got a fairly keen eye for distance when it is a few yards, so I never really need to walk around looking for a sprinkler head. I'm just not that good, which may come as a complete shock to everyone. 🤣 I don't ever need to know right down to the last yard what a distance may be because I might hit my 22* hybrid 150 yds.. Or I might hit it 128.
Like Steve would say, I hit the ball 'til it's on the green, then putt 'til it's in the hole!
And I'm damned fast when I do it.