Basic slide rule theory and use (Part 1): C and D scales

Collision in the Persian Gulf Leaves USS Porter (DDG-78) Heavily Damaged. The Arleigh Burke-class destroyer USS Porter (DDG-78) sustained substantial damage after a collision with the oil tanker MV Otowasan while operating in the Persian Gulf. During the incident, the larger tanker made contact with Porter’s starboard side, delivering a powerful impact that compromised sections of the destroyer’s outer hull. The collision resulted in visible structural damage, including buckled steel plating, to

How to Use a Slide Rule: Multiplication/Division, Squaring/Square Roots