Mariner Studio is the complete maritime toolkit for sailors, boaters, and professional mariners. Nautical charts, live AIS vessel tracking, marine weather, tidal predictions, route planning, USCG Coast Guard exam prep, and GMDSS certification training -- all in one app. Free to download with daily free access to premium features.

INTERACTIVE NAUTICAL CHARTS

The heart of Mariner Studio is an interactive nautical chart that puts every piece of marine data in one place. Toggle overlays to view weather, AIS vessel traffic, tidal stations, current stations, and buoy data directly on the chart. Pan, zoom, and tap any annotation to go deeper -- dock details, tide heights, current speeds, vessel identities.

AIS VESSEL TRACKING

See live vessel traffic on your chart. Mariner Studio shows nearby ships with their names, headings, speeds, and vessel types overlaid directly on the nautical chart. Know what is moving around you before you leave the harbor.

COAST GUARD EXAM PREP

Study for your USCG license with real exam questions covering Deck and Engine ratings. Practice exams, timed study sessions, image-based questions, and detailed explanations for every answer. Track your progress across all exam modules.

GMDSS TRAINER

Prepare for your GMDSS radio operator certification. All six exam elements with practice quizzes, timed exams, and answer review. Study at your own pace with daily free questions or subscribe for unlimited access.

MARINE WEATHER

Access hourly marine weather forecasts for any location on your chart. Wind speed, wave height, visibility, and precipitation -- timed and layered so you can plan around conditions before you head out.

TIDAL PREDICTIONS

Tap any tidal station on the chart to view a full 7-day tidal prediction graph. Height stations and current stations both included. Getting the tides right matters for every departure and arrival.

ROUTE PLANNING

Plan routes with waypoints directly on the chart. Mariner Studio calculates distances and headings between each point and previews your complete route before you leave the dock.

BUOY DATA & NAVIGATION TOOLS

Tap any buoy marker to view current observations -- sea conditions, temperature, and station data. Convert between nautical miles, statute miles, kilometers, knots, and other marine units.

PERFECT FOR

- Sailors planning coastal and offshore passages
- Mariners studying for USCG license exams
- GMDSS certification candidates
- Power boaters navigating harbors, rivers, and open water
- Anyone who wants live AIS vessel tracking and marine weather

FREE TO USE

Mariner Studio is free to download. Explore charts, try exam questions, and check weather daily at no cost. Subscribe to unlock unlimited access to all features:

- Monthly: $4.99/month
- Annual: $34.99/year (save 42%)

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Google Play subscriptions.

Questions? Email ospreyapplications@gmail.com or visit ospreyapps.com

Osprey Applications LLC -- Built for mariners, by mariners.