Flashing Light: Morse Trainer

Walk into your U.S. Coast Guard flashing-light check able to read the lamp, send clean timing, and call ICS code groups without hesitation. Train receive, transmit, and ICS signal work at the real 4-8 WPM exam range.

This is a chartroom instrument, not a gamified Morse toy: a single high-contrast lamp on a dark, low-glare screen, with instrument-grade typography. It trains the three things a real check demands, and measures readiness by actual accuracy, not streaks or confetti.

Purpose-built for USCG deck-license candidates, maritime academy cadets, and renewing or upgrading officers. CW and signaling hobbyists who want disciplined visual Morse practice will feel at home too.

WHAT IT TRAINS

• Receive: decode characters, code groups, and signals flashed by the on-screen lamp, then answer for immediate scoring.
• Transmit: send Morse back with a press-and-hold lamp key. A timing strip grades every dot, dash, and gap to the millisecond against tolerance, with optional haptics.
• ICS: decode the International Code of Signals group, then choose its PUB 102 meaning - both graded.

A REAL COURSE, NOT FLASHCARDS

• Two progressive tracks: Characters (maritime-tuned Koch order) and Signals & phrases (single-letter signals, prosigns, SOS, ICS groups).
• Leitner 5-box spaced repetition schedules your weak items and shifts you from multiple-choice to recall as items mature.
• Farnsworth spacing tightens from wide to exam cadence automatically.
• A quick Daily session and a tap-to-preview Reference grid of every letter, number, and code.

HONEST READINESS, NO CONFETTI

• Mock Exam runs a realistic USCG-style sequence: single and grouped receive, SOS and single-letter signals, timed items, transmit prompts, and ICS decode/meaning.
• A Readiness estimate across Receive, Transmit, and ICS - with replay dependence tracked as its own signal.
• Ranked weakest-symbol and confusion-pair tables, accuracy by speed, and recent-session history.

DESIGNED FOR THE EYES

• First-launch photosensitivity warning; honors Reduce Motion.
• Symbolic-only mode replaces flashes with an on-screen dot/dash indicator.
• Adjustable lamp brightness, optional haptics, high-contrast controls, large touch targets, VoiceOver throughout.

FREE TO START

• The complete Learn course (both tracks, spaced repetition, Farnsworth spacing, Daily session, Reference grid).
• Receive drills at 4 WPM, the full progress dashboard, and review tables.

ONE-TIME FULL ACCESS ($9.99, lifetime - not a subscription) unlocks:

• Transmit drills with per-pulse millisecond timing.
• ICS code-group decode plus PUB 102 meaning grading.
• The full Mock Exam.
• Receive drills at every speed, 5-8 WPM.
• Progress export to JSON.

Works fully offline and on-device - no account required, no tracking, and your progress stays on your device. Built on public-domain maritime standards: Morse, the International Code of Signals, and PUB 102.

From Osprey Applications LLC, maker of Coast Guard Exams and Mariner Studio.