Master Maritime
Visual Communications
& Navigation.
Professional-grade maritime training tools, COLREGs study guides, and signal flag animators for deck officers and maritime cadets. 100% free with zero installations. Plus, reserve your spot for our upcoming advanced hydrodynamic simulators.
Essential Maritime Training
Tools & Study Aids
Every tool is completely free, browser-based, and built for real maritime training scenarios.
Semaphore Flag Animator
Master semaphore arm positions visually. A dynamic, interactive study aid to perfect your maritime visual communications.
Launch Animator →ICS Signal Flag Trainer
Learn the International Code of Signals quickly. Test your knowledge of flag hoists and their exact meanings.
Start Training →NavRules Comparator
The definitive digital reference for mariners. Instantly compare US Inland rules against International COLREGs side-by-side.
Compare Rules →Maritime Flag Size Calculator
Ensure strict compliance with official vessel flag sizing standards. Fast, accurate calculations for any ship class.
Calculate Size →Signal Flag SVG Generator
Generate crisp, scalable vector graphics of any maritime signal flag for your digital projects, presentations, or study notes.
Generate SVGs →Get Early Access to
Pro-Grade Maritime Simulators
We are preparing to roll out our highest-fidelity maritime training suite: the Free Ship Handling Simulator (Whitehorse v1.2), the NavLights 3D Visualizer, and the Acoustic Whistle Analyzer. Due to the heavy server load required for real-time advanced hydrodynamics and intensive 3D rendering, beta access is strictly limited to the first 500 users.
Don’t miss the deployment. Secure your spot on the bridge before the servers hit capacity.
Request Beta AccessBuilt to Advance Your
Maritime Career
Maritime Cadets
Turn dry textbook theory into interactive practice. Ace your navigation exams and master visual signaling before you step aboard.
Deck Officers
Keep your bridge skills razor-sharp. Refresh your memory on critical COLREGs, night lights, and emergency maneuvering procedures.
Maritime Instructors
Integrate reliable, frictionless study aids into your curriculum without dealing with heavy software licenses or IT roadblocks.
Frequently Asked Questions
Yes! Our core visual communication utilities, flag trainers, and rule comparison tools are 100% free to use.
No. Every tool on Nautical Core runs entirely in your web browser. You can study on your phone, tablet, or desktop.
Absolutely. Our NavRules Comparator and training modules are meticulously aligned with the latest International Regulations for Preventing Collisions at Sea.
To ensure smooth, crash-free performance. The advanced physics and 3D rendering engines require significant server power, so we are managing server stability by letting in controlled batches of users.
Yes! All Nautical Core tools are fully responsive and optimized for mobile devices. Whether you’re on a smartphone, tablet, or desktop, the experience is seamless with no app installation required.
Simply click “Get Early Access” and submit your email. You’ll be among the first 500 users notified when the Whitehorse Simulator, NavLights 3D Visualizer, and Acoustic Whistle Analyzer go live. Beta access closes May 31, 2026.
Ready to Elevate Your
Seamanship?
Start training right now with our free maritime utilities, or secure your exclusive spot for the ultimate browser-based bridge experience before capacity is reached.