Live brass-rose chain
Set true course, E/W variation, and ± deviation; linked tapes update magnetic and compass headings while a T→V→M→D→C highlighter walks every step under a persistent educational-reference banner.
Offline ground-school workbench
Heading Chain Rose
Scrub a live brass compass rose through T→V→M→D→C, reverse the chain for oral-exam problems, and drill variation and deviation until checkride wording feels automatic—fully offline on a leather ground-school desk.
9 tools
Rose, reverse, card, drills & more
100% on-device
No account, network, or cloud
US regions
Authored variation cards at launch
iOS
Education · ground-school workbench
Illustrative marketing figures; not App Store metrics.
Leather desk, brass chain
Heading Chain Rose turns the classic true-to-compass heading chain into an interactive brass workbench for student pilots, CFIs, and checkride candidates. Dial true course, east/west variation, and compass deviation; watch linked brass tapes light each T→V→M→D→C step; reverse from compass back to true; apply an eight-point deviation card with a smooth interpolated curve; and load authored US regional variation cards with worked numeric examples already filled. Dual-case compare boards, illustrated rule boards, named calculation presets, knowledge drills with instant rationales, and paper-style study-card export sit inside an early-aviation desk of sky-blue panels, cloud-white cards, leather-brown trays, and dusk-orange step cues. Educational reference only—not for in-flight navigation. On-device only: no account, no network, no cloud.
Reverse-chain recovery
Enter compass heading plus deviation and variation to recover magnetic and true course for oral-exam and radio-nav style problems, with the rose animation running backward.
Eight-point deviation editor
Fill N–NW error values for a generic trainer, preview the brass deviation curve, and apply interpolated deviation while scrubbing any heading on the rose.
US variation library & dual compare
Dozens of city and training-area isogonic cards load into the rose with worked examples; park two full chains side-by-side to see which step drives the compass-heading delta.
Drills, rule boards & presets
East-is-least puzzles, sign flips, and compass-error traps with rationales; brass-framed explainers with numeric examples; save named rose setups locally with SwiftData only.
Paper study-card export
Render rose, step tape, and final headings to a shareable image via the system share sheet—footer still marks educational reference only—for binders and instructor review.