Question 1013Navigation General

The correct answer is B) 640 yards. To calculate the distance to the shore, we can use the formula: Distance = (Speed of Sound x Time Delay) / 2. The speed of sound in air is approximately 1,100 feet per second. Since the time delay is 3.5 seconds, the distance can be calculated as: (1,100 ft/s x 3.5 s) / 2 = 1,925 feet, or 640 yards. The other options are incorrect because they do not accurately reflect the distance based on the given time delay and the speed of sound. Option A (315 yards) and Option C (143 yards) are too short, while Option D (480 yards) is too long.