They signify the first 100ft you don’t need to count I guess. I have 80ft of chain that isn’t marked and my first mark starts at 100 (80ft of chain and 20ft of rode) then 25 and 100 increments after.Could someone please explain how marking every 25 feet actually helps?
If you anchor in 20 feet, and have 5 feet from your bow to the water, that's 25 feet, so 100 feet of combined rode deployed is 100 / 25 = 4:1. What do the extra 25 foot markers between the anchor and the first 100 feet do for you?