One thing I learned from @Drifter is a good side scope also makes it easier to bring you rod around the anchor if a fish wraps you.I really should scope out more often. If it isn't windy I don't bother and don't feel it is needed but man, when the wind is blowing scoping aids.
Anchor scopeNot familiar with that term.
I had to look it up too. Figured if those guys were doing it I better know. It's a right triangle math problem if you want to figure depth. I use a survey clinometer to figure the angle of my braid when salmon trolling, then sine or cosine, based on angle measured x line out = depth.