The streams I fish don’t seem to have fish that big...Nice...I have a couple of permanent paint pens that I used to make a 40" and 48" mark on my musky rod. Although, usually they can chill in the net for a bit untill I get the actual tape measure, which I'll do if they're mid-40" or above. The marks on the rod seem to be holding up petty well on their own. I like the idea of clear coat over them though.
Got the idea from reading articles and posts like this.For those who mark their sinking lines, do you perform some quick geometry calculations based on the angle entering the water (with the optical correction of entering water of course) to calculate the actual depth? I'm genuinely curious how marking your line really helps....unless you're fishing vertically.
I agree with Kent, mark the line in ten foot increments all the way to the end of the line. It will not only help you know what length of line you're casting, it can also help when you're fishing. As an example, if you know you've got 70 ft. of fly line out and you get a tug and miss the fish, you know approximately how much line you should have out on your next cast.