The Weems & Plath Nautical Slide Rule, part number 105, is a practical tool designed for mariners to assist in performing various navigational calculations and conversions. This traditional slide rule is a favorite among sailors for its ability to quickly and accurately solve complex problems related to navigation without the need for electronic devices or batteries.

Key Features:
Versatile Navigation Calculations: The slide rule includes scales for common maritime calculations, such as speed, distance, time, and compass bearings.
Simple to Use: Its user-friendly design allows sailors to perform essential navigational tasks efficiently with just a slide mechanism.
Durability: Made from high-quality materials, it is designed to withstand the marine environment and maintain accuracy over time.
Portable: The compact size of the slide rule makes it easy to carry onboard a vessel, fitting into a navigational kit or pocket.
No Need for Power: Unlike electronic devices, this slide rule requires no batteries or charging, making it ideal for use in remote locations or during power outages.
Typical Uses:
Speed, Distance, and Time: Quickly calculating the relationship between speed, time, and distance, critical for voyage planning.
Compass Bearings: Converting compass bearings into navigational courses.
Unit Conversions: Converting between different units of measurement commonly used in navigation, such as nautical miles and kilometers.
Trigonometric Calculations: Helping in the calculation of angles, course directions, and other geometric operations needed in marine navigation.