The Doctor's Improvised Gravity Measurement Hat

The Doctor strips the stiff black felt from the brim of his ceremonial hat, rolling it into a crude cone that fits neatly over K9’s scanner array. He fashions a quick-release clip from a torn section of his scarf to secure the makeshift hat in place. The stiffened felt’s weight creates enough drag to provide a measurable fall rate in Delta Magna’s unstable gravity, allowing Romana to calculate their local gravity coefficient with surprising accuracy despite the scanner’s erratic readings. When dropped vertically, the hat drifts down at a rate approximating local gravity—a critical three-point reference for survival.