Nautical Flags Helper

NauticalFlagsHelper (Package Name: com.napolovd.nautical.flagshelper) is developed by Pirate Cats and the latest version of Nautical Flags Helper 3.4 was updated on October 25, 2026. Nautical Flags Helper is in the category of Communication. You can check all apps from the developer of Nautical Flags Helper and find 161 alternative apps to Nautical Flags Helper on Android. Currently this app is for free. This app can be downloaded on Android 7.0+ on APKFab or Google Play. All APK/XAPK files on APKFab.com are original and 100% safe with fast download.

Learn the international signal flags, Morse code and flag semaphore in one app. Study at your own pace with clear pictures and flashcards, then test yourself with quizzes at three levels. Made for sailors, boaters, sea cadets, maritime students and anyone curious about how ships talk to each other.
SIGNAL FLAGS, A TO Z
• All 26 letter flags, from Alfa to Zulu, with the phonetic name of each one
• The meaning of every flag when flown alone, such as A: "I have a diver down; keep well clear at slow speed" and O: "Man overboard"
• Ten numeral pennants with their code words, such as Nadazero and Unaone
• The four substitute flags and the answering pennant, with how each one is used
MULTIPLE-FLAG SIGNALS FROM THE INTERNATIONAL CODE OF SIGNALS
Browse more than 1,800 flag signals based on the International Code of Signals (Pub. 102, 2020 edition).
• General two-letter signals, such as NC "I am in distress and require immediate assistance"
• Medical three-letter signals that start with M, such as MAA "I request urgent medical advice"
• Worked examples of numbers: courses, bearings, dates, times, latitude, longitude, distance and speed
• Step-by-step examples of how substitute flags repeat a flag in the same hoist
• Tables of complements that add detail to a signal, like the kind of assistance or the state of the sea
• Search by code or by word, and switch to List View to see every meaning at a glance
MORSE CODE
• Dots and dashes for every letter and number
• Tap Listen to hear how each character sounds
FLAG SEMAPHORE
• Arm positions for every letter and number
• Special signals such as Attention, Error, Cancel, Numerals and Space
STUDY YOUR WAY
• Flashcard Mode: tap a card to flip it and check your answer
• Shuffle the cards or sort them from A to Z
• Zoom in to see the details of each flag
• Short explanations of each topic, with links to read more on Wikipedia
QUIZZES AT THREE LEVELS
• Easy (10 questions), Medium (20 questions) and Hard (30 questions)
• Match a picture to its name, or a name to its picture
• Medium and Hard also ask what each signal means
• Hard picks wrong answers that look like the right one, so you learn the differences between similar flags and Morse patterns
• Use a hint to remove two wrong answers
• Build a custom quiz from letters, numbers, Morse code and semaphore
• Turn on "Next question automatically" for faster practice
• See your correct, incorrect and skipped answers and your time after each quiz
TRACK YOUR PROGRESS
• Daily goals for questions answered and study time
• Charts of correct and incorrect answers by day, week, month and year
• Total quizzes, average accuracy, time spent and best score
DESIGNED FOR EVERY SCREEN
• Light and dark themes, or follow your system setting
• Layouts made for phones and tablets
• Available in English, Spanish, French and Russian
Whether you are preparing for a sailing course, refreshing your seamanship skills or teaching a youth group, Nautical Flags Helper keeps the flags, Morse code and semaphore in your pocket.
The app is free to use and shows ads. An optional one-time in-app purchase removes all ads. There is no subscription.
This app is a study aid. It is not an official publication and is not intended for navigation.

NauticalFlagsHelper 3.4 Update

• Refreshed design with dark mode and tablet support
• New Multiple Flags section with signals from the International Code of Signals
• Flashcard mode for studying
• Quiz difficulty levels: Easy, Medium and Hard
• Listen to any signal in Morse code
• Choose the app language right in the app
• Better accessibility: screen reader support, haptics and reduced motion
• Option to remove ads
• Added translations, plus app stability fixes