Parallel Rule — Captain Fields 15″

Precision Navigation with Timeless Craftsmanship by Weems & Plath

A cornerstone of traditional chartwork, the Captain Fields 15″ Parallel Rule is one of the most trusted tools on the chart table. Favoured by professional navigators, instructors, and cruising sailors alike, this best-selling model combines accuracy, durability, and smooth handling in a classic, sea-ready design.

Built for dependable manual plotting—especially when electronics are unavailable—it delivers precise, repeatable transfers of bearings and courses across nautical charts.

⚓ Key Features

• 📏 15″ (381 mm) working length — ideal for chart tables and full-size plotting sheets

• 🛠️ Brushed aluminium arms — rigid, lightweight, and corrosion resistant

• ✋ Polished aluminium handles — comfortable grip with excellent control

• 🔺 Precision-milled, bevelled edges — clean alignment and accurate contact on charts

• 📐 Integrated protractor scale — quick reference for bearings and angles

• 📦 Balanced construction — sturdy without unnecessary bulk

🛠️ Built to Last at Sea

Designed for the realities of marine use, this 15″ parallel rule offers:

• Smooth, consistent movement across charts

• Marine-grade aluminium components for long service life

• Clear visibility over chart detail for confident plotting

Whether used daily for coastal navigation or kept as a reliable backup for offshore passages, it’s a tool you can trust.

📐 Dimensions & Specifications

🗺️ Ideal For

• ⛵ Coastal and offshore navigation

• 🧭 Yachtmasters, skippers & sailing enthusiasts

• 🏫 Maritime training & seamanship schools

• 📚 Chart plotting and course setting on board

In the Box:

• 1 × Captain Fields 15″ Parallel Rule (aluminium arms & handles)

Care Tip: Wipe clean with a dry cloth after use to maintain clarity and longevity.

The Captain Fields 15″ Parallel Rule delivers dependable, manual navigation precision—an enduring essential for every well-prepared mariner.