COLREG Sounds: Ship Whistles

Rules 32-37 lessons & quiz

$0.99 · Designed for iPad. Not verified for macOS.

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Hear every signal, study Rules 32 to 37 and test yourself with text, image and sound questions. Works offline, no ads, in 7 languages. COLREG Sounds teaches you the sound signals of the International Regulations for Preventing Collisions at Sea (COLREG 72): what each blast means, what it sounds like and when it is used. Built for maritime students and professionals, skippers, recreational sailors and anyone who wants to understand the language of whistle signals at sea. LEARN • Lessons on Rules 32 to 37: definitions, equipment for sound signals, manoeuvring and warning signals, signals in restricted visibility, signals to attract attention and distress signals. • Figures and diagrams of every manoeuvre that you can enlarge to see in detail. • Change the text size to read comfortably. LISTEN • A listen button under each rule: short and prolonged blast, altering course to starboard or to port, going astern, overtaking, agreement, doubt, approaching a bend, vessel making way or stopped, at anchor, aground, pilot vessel and more. PRACTICE • A 5-question evaluation drawn from a bank of 45, with text, image or sound questions. • 30 seconds per question, and the clock pauses while you listen to a recording. • Every answer comes with its explanation. TRACK YOUR PROGRESS • Statistics with stars, correct and wrong answers, and your trend. ALSO • 7 languages: Spanish, English, Portuguese, French, Italian, German and Catalan. • Works without an internet connection. • No ads, no accounts and no personal data collected. Content based on the text of the IMO COLREG 1972. This app is a study aid: it does not replace the official text of the Regulations or required training, and must not be used as a navigation instrument. Developed by Advenio Software.

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Version 2.0, completely renewed: • New design and a welcome splash. • Listen buttons for each signal inside the lessons. • A 5-question evaluation with a clock, full-screen results and star statistics. • Now in 7 languages. • Texts checked against the official COLREG. • An About screen and app rating.

Version 2.0.0

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    Information

    Seller
    Advenio Software SRL
    Size
    81.7 MB
    Category
    Education
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPad
      Requires iPadOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Advenio Software SRL
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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