Nautical Slide Ruler (Weems & Plath 105) Imray - North Atlantic Ocean Red represents courage and strength

Red represents courage and strength

2 General Security Precautions

4 Fixed Water Spray Systems

3 Colour of Cover

Nautical Slide Ruler (Weems & Plath 105) Imray - North Atlantic Ocean Red represents courage and strengthThe 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;