When making a tattletale line for DBN what is the length of the tattletale line and the length of the connection points?

• A. 40 in length, 43-1/2 in between connection points
• B. 45 in length, 42 in between connection points
• C. 43-1/2 in length, 40 in between connection points
• D. 41 in length, 38 in between connection points

Answer: (C)

The sizing here is about giving the tattletale line enough length to reach between the connection points while still leaving extra length for knots and passing through fittings. You measure the distance between the connection points and add enough length to tie securely and let the line run through any hardware. In this setup, the tattletale line is longer than the span by a specific allowance, resulting in a line length of 43-1/2 inches with the connection points 40 inches apart. That extra 3-1/2 inches provides the needed room for knots and hardware so the line can be attached firmly and operate correctly.

If the line were shorter than the span, it wouldn’t reach between the points. If the line length didn’t leave adequate slack for knots and fittings, it wouldn’t secure properly or could bind. The numbers in the correct setup reflect the standard allowance to account for knots and hardware, ensuring proper tension and a reliable tattletale indication.