Ahoy: Sailing Pocket Guide

Flags, lights, buoys, signals

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Every flag, light, buoy, cloud and signal, one glance away. Free to use, no account needed. Unlock full offline access with Ahoy Pro. Ahoy is a pocket field guide for sailors. Pull it out, check, and get back to the water. The captain says a word you don't know. Lights appear on the horizon you can't identify. A buoy sits off the bow and you can't remember which side to pass. Ahoy answers in seconds. WHAT'S INSIDE • Ship Lights: identify vessels at night by their light pattern, shown from every angle as glowing schematic diagrams • Signal Flags & Marine Alphabet: all 36 flags and their meanings, Alpha to Zulu • Buoys: lateral, cardinal and other sea marks, with the shapes each mark can take • Day Shapes: cones, balls and diamonds, and what they tell you about a vessel • Beaufort Scale: real sea-state photos for every force from 0 to 12 • Clouds: read the sky with photo references and what each cloud means for your weather • Sound Signals: blast patterns for good and restricted visibility • Radio Help: ready-to-read VHF scripts for Mayday, hailing a vessel and radio checks • Dictionary: searchable sailing jargon, from abeam to windward MADE FOR REAL TRIPS • Polish and English, following your device language • No ads, no account needed • IALA buoyage for your region AHOY PRO • A one-time purchase unlocks full offline access, so every reference works with no signal at sea • Everything else stays free FOR LEARNERS AND CREW Whether you're preparing for a recreational licence or joining a friend's boat as crew, Ahoy gives you the confidence to be useful on deck. It won't pretend to replace a course. Ahoy is reference material for recreational sailing, not a navigation tool. Always verify against official, up-to-date sources.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Offline access is steadier. A slow or dropped connection no longer hides your bundled reference while you are online.

Version 1.3.0

The developer, Krzysztof Przekwas, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Krzysztof Przekwas
Size
  • 109.1 MB
Category
  • Reference
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 18.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 2.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Krzysztof Przekwas
  • Developer Website
  • Privacy Policy

    • You Might Also Like