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Parallel Rule - Captain Fields 15"

Name: Parallel Rule - Captain Fields 15"
Brand: Boat Books
Price: 49.95 AUD
Availability: InStock

$49.95

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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

Specification	Details
Length	15″ (381 mm)
Thickness	6 mm (1/4″)
Construction	Transparent acrylic ruler with aluminium arms
Handles	Polished aluminium
Edge Design	Precision-milled, bevelled
Scale	Integrated protractor
Weight	213 g (0.47 lb)

🗺️ 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.

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Frequently Asked Questions

What is the Parallel Rule - Captain Fields 15" used for?

This chart plotting instrument is used in marine and aerial navigation for measuring distances, plotting positions, and calculating bearings on nautical and aeronautical charts. It is an essential tool for accurate manual chart work.

Is this instrument compatible with standard nautical charts?

Yes, this instrument is designed for use with standard nautical charts. Check that the scale markings correspond to the chart scale you are working with for accurate measurements and bearings.

Is this instrument suitable for recreational or professional use?

Chart plotting instruments from Mapworld suit both recreational sailors and professional navigators. They are accurate, durable tools built for regular chart work in marine and aviation navigation.

Does Mapworld ship the Parallel Rule - Captain Fields 15" across Australia?

Yes, Mapworld ships Australia-wide. Standard shipping is a flat $7 rate, with free standard shipping on orders over $75. Express options are available at checkout. Most orders placed before 2pm AEST on business days are dispatched the same day.