For your measuring device you may want to use electrical tape with different banding. For example White = 1' Yellow = 5' Red = 10' so 1 yellow 4 white would be 9'(If your rope is white don't use white they sell blue, green...you name it basically.) We use a similar system on our hoses and it holds up well. If you just use duct tape and write the number on there it may get worn off quickly with repeated use. Just my 2 cents, welcome to the forum by the way. That or you could just tie one knot at 5' and two at 10' with duct tape in between make it easier for counting.
Last edited by Diver Cody; 06/02/15 03:09 PM. Reason: Spelling knot not correctly :)
