NAVISIGN: Signal Flags & Buoys

Hugo Uberger OÜ

Contains adsIn-app purchases

About this app

NAVISIGN — Professional Maritime Reference

Your complete offline guide to maritime signals, navigation marks and
communication. Built for sailors, yacht crews, navigators and maritime
students worldwide.

No internet required. Everything works offline — at sea, in remote
anchorages, or anywhere connectivity is limited.

━━━━━━━━━━━━━━━━━━━━━━━━
📌 WHAT'S INSIDE
━━━━━━━━━━━━━━━━━━━━━━━━

🚩 SIGNAL FLAGS — ICS (International Code of Signals)
All 26 alphabet flags (A–Z) with official meanings, visual patterns
and phonetic letter codes. Instantly identify any flag encountered
at sea.

⚓ BUOY & MARK GUIDE — IALA System
8 buoy types fully explained with action guidance and light
characteristics:
• Red (Port) and Green (Starboard) lateral marks
• Yellow Special mark
• Isolated Danger mark
• Safe Water mark
• North, South, East and West Cardinal marks

📡 MARITIME MESSAGES
21 standard maritime signals organised by category:
• Distress — SOS, Man Overboard, Sinking, Fire on board
• Medical — Doctor required, Medical assistance
• Navigation — Pilot required, Vessel stopped, Diver down
• Notice & Greeting signals

🔊 MORSE CODE
Complete reference: letters, digits, punctuation and 16 essential
maritime signals — SOS, MAYDAY, PAN-PAN, CQD and more.

━━━━━━━━━━━━━━━━━━━━━━━━
🌐 8 LANGUAGES
━━━━━━━━━━━━━━━━━━━━━━━━
Full content translated into:
English · Русский · Français · Deutsch
Español · Português · العربية · 中文

━━━━━━━━━━━━━━━━━━━━━━━━
⭐ PREMIUM — ONE-TIME PAYMENT
━━━━━━━━━━━━━━━━━━━━━━━━
No subscription. No auto-renewal. Pay once — own forever.

Unlocks:
✓ All 26 signal flags + 10 numeric pennants
✓ Complete buoy reference (all 8 IALA types)
✓ All 21 maritime messages
✓ All 16 Morse code maritime signals
✓ Ad-free experience
✓ All future modules included at no extra cost

━━━━━━━━━━━━━━━━━━━━━━━━
🔮 COMING SOON
━━━━━━━━━━━━━━━━━━━━━━━━
• AI Flag Recognition via camera
• Semaphore Alphabet
• Ship Navigation Lights
• VHF Radio channel guide

━━━━━━━━━━━━━━━━━━━━━━━━

Whether you're a seasoned skipper or learning the ropes — NAVISIGN
gives you instant access to the maritime knowledge you need,
wherever you sail.

What’s new

Updated Google Play Billing Library to version 8.0.0. Technical improvements and bug fixes.