Nautical Slide Ruler (Weems & Plath 105) Rio de la Plata British Admiralty Nautical Chart 3454:

British Admiralty Nautical Chart  3454: New York Hudson River Hoboken to Edgewater is a standard nautical chart

Cherbourg is a standard nautical chart

3 Evolution of Temperature Recording Systems

Marine Fire Equipment Sign: Sprinkler Control Valve + symbol

Nautical Slide Ruler (Weems & Plath 105) Rio de la Plata British Admiralty Nautical Chart 3454:The Nautical Slide Rule offers a foolproof, immediate solution to all common speed time distance problems and is convertible to statute or nautical miles. It also allows the user to compute distance in yards if the speed is factored in knots. The Nautical Slide Rule is sometimes referred to as a Time Speed Distance Calculator. Immediate solution to all speed time distance problems Equally applicable for nautical or statute miles Speed in knots or mph;