The Rotating Bezel Invented by Weems- the Rotary Verge Ring
File:Dalton Dead Reckoning Computor Type E-6B, Weems System of Navigation, Annapolis MD - Oregon Air and Space Museum - Eugene, Oregon - DSC09756.jpg - Wikimedia Commons
OLD DALTON DEAD RECKONING COMPUTER WEEMS SYSTEM OF NAVIGATION | eBay
Finding Berlin in Binghamton: Weems, Link, and the Celestial Navigation Trainer – Bookworm History