What marks the 20 fathom mark on a lead line?

What marks the 20 fathom mark on a lead line?

• A. 2 Knots
• B. Red
• C. Black
• D. White

Answer: (A)

On a lead line, depth is read from marks tied into the line. Each knot marks a tens-of-fathoms interval, so the point that corresponds to twenty fathoms is indicated by two knots tied in the line. When you lower and then haul in the line, you look for those knots to identify the depth quickly, even in rough seas. The color bands on the line exist for other increments, but the indicator for twenty fathoms is specifically the presence of two knots.

On a lead line, depth is read from marks tied into the line. Each knot marks a tens-of-fathoms interval, so the point that corresponds to twenty fathoms is indicated by two knots tied in the line. When you lower and then haul in the line, you look for those knots to identify the depth quickly, even in rough seas. The color bands on the line exist for other increments, but the indicator for twenty fathoms is specifically the presence of two knots.