AFE AS-5 Ruler 41 cm

The AFE AS-5 Ruler 41 cm is an indispensable precision tool in aviation, engineered specifically to satisfy the meticulous flight planning demands of flight students and professional aviators alike. Manufactured from thick, premium-quality plexiglass, this aeronautical ruler guarantees maximum durability and high optical clarity over any VFR chart, allowing every pilot, captain, or flight instructor to plot courses and measure distances flawlessly before taking the controls in the cockpit.

Its technical design features bevelled edges that minimize parallax error while ensuring smooth sliding across paper maps. The outer edges are meticulously marked with nautical miles (NM) for both 1:500,000 and 1:250,000 chart scales. Additionally, the centerline integrates land statute miles (SM) and kilometers (KM) marked at a 1:500,000 scale, simplifying unit conversion and terrain reference planning during air navigation procedures.

A standout operational advantage of this scale is its 10 nautical mile width (at 1:500,000 scale), specifically designed to help pilots visually evaluate Minimum Enroute Altitude (MEA) safety corridors and avoid surrounding terrain obstacles. Measuring an ergonomic length of 41 cm, it offers ample coverage across large chart sections without being cumbersome inside the flight deck during active flight operations. To equip your flight bag with top-tier air transport navigation gear, discover our full range in the charts accessories section at Bucker Book.

Features of AFE AS-5 Ruler 41 cm

• 📏 Heavy-Duty Plexiglass Construction: High-grade transparent material built for exceptional durability and clear chart legibility.
• 📐 Bevelled Anti-Parallax Edges: Precision-milled edges that facilitate smooth sliding across paper charts while reducing visual measurement errors.
• 🗺️ Multi-Scale Nautical Marking: Outer edges scaled in NM (1:500,000 and 1:250,000) with central markings for SM and KM (1:500,000).
• 🛡️ 10 NM Safety Corridor Width: Calibrated width for quick visual determination of Minimum Enroute Altitude (MEA) terrain clearance.
• ✈️ Ergonomic 41 cm Length: Perfectly sized to span long route legs comfortably on standard aeronautical charts.

Technical Specifications

• 🧩 Product Title: AFE AS-5 Ruler 41 cm.
• 📏 Total Length: 41 cm.
• 🧵 Material: Thick high-clarity plexiglass.
• 📐 Outer Scales: Nautical Miles (NM) at 1:500,000 and 1:250,000.
• 📊 Centerline Scales: Statute Miles (SM) and Kilometers (KM) at 1:500,000.
• 🏔️ Special Feature: 10 NM width (1:500,000) for MEA safety calculations.

Frequently Asked Questions (FAQs)

What is the purpose of the 10 NM width on the AFE AS-5 Ruler 41 cm?

The 10 NM width at 1:500,000 scale allows pilots to quickly measure a 10-mile corridor along their route to calculate Minimum Enroute Altitude (MEA) and ensure obstacle clearance.

Is this ruler easy to handle inside a tight cockpit?

Yes, its 41 cm length provides the ideal balance between full chart coverage and easy handling in confined cockpit environments.