In this episode of the US Navy History Podcast, hosts Dale and Christophe take a deep dive into the vital, often overlooked role of machinist mates (MMs) in the US Navy. The discussion covers the evolution of the machinist mate rate from the age of steam to the nuclear-powered vessels of today, highlighting their indispensable contributions to naval operations. From maintaining propulsion systems and monitoring gauges to innovating in crisis situations, machinist mates are lauded as the heartbeat of the fleet. The episode concludes with a tribute to Medal of Honor recipient Water Tender First Class Elmer C. Bigelow, whose bravery during World War II exemplified the courage and dedication of these essential sailors.