Question 695Navigation General

The correct answer is C) each time the chart is changed. In a microbarograph, the pen should be checked and the inkwell filled each time the chart is changed. This is because the pen and inkwell need to be in proper working order to accurately record the barometric pressure changes on the chart. If the pen is not functioning properly or the inkwell is empty, the data recorded on the chart may be inaccurate, which could lead to issues in monitoring and reporting weather conditions. The other options, such as checking the pen and filling the inkwell once per week (A), daily (B), or once per month (D), are not frequent enough to ensure the reliable operation of the microbarograph and the integrity of the recorded data.