Question 1121Navigation General

The correct answer is D) The rate and direction of change of barometric readings. The rate and direction of change in barometric pressure is the most useful factor for predicting weather changes. As atmospheric pressure drops, it often indicates the approach of a low-pressure system, which is typically associated with unsettled weather. Conversely, rising barometric pressure usually signifies the approach of a high-pressure system and more stable weather conditions. The magnitude and speed of these pressure changes provide valuable insights into the developing weather patterns. The other options, while relevant, are not as useful as the rate and direction of change. The previous and present barometer readings alone do not give as clear an indication of the weather trends as the rate of change. Similarly, the difference in readings over 24 hours does not provide the same level of detail and predictive power as the continuous monitoring of pressure changes.