Question 3400 Deck General

The correct answer is D) The chain contacting a chock or fairlead between the tensiometer and the lower swivel fairlead. The tension measured by the tensiometer will only accurately reflect the actual chain tension if the chain runs freely between the tensiometer and the lower swivel fairlead. If the chain contacts any intermediate chocks, fairleads, or other obstructions, it can create additional friction that causes the tensiometer to display a lower tension than the actual tension on the chain. This is the key factor that can lead to a significant difference between the measured and actual chain tension. The other options are incorrect because they would not directly impact the accuracy of the tensiometer reading in the way that chain contact with intermediate fittings would. Temperature differences and the type of anchor/mooring line or seafloor material may affect the overall tension, but would not necessarily create a discrepancy between the tensiometer reading and the actual tension.