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A close look at Maritime Master Knots, the study app that renders forty two essential knots as animated 3D rope you can rotate, zoom, and scrub, with full reference detail and Ashley numbers for every knot.

A beginner's roadmap to day skipper shorebased theory. See the main topics a course covers, from chartwork and tides to the COLREGs, buoyage, and weather, and how the free Skipper app helps you practise each one as a study companion.

A gentle, conceptual study guide to marine radar for learners: what a radar picture shows, the ideas behind CPA and TCPA, and what ARPA target tracking is for. Plus how the Maritime Master Radar app lets you practise these concepts on a simulated display.

Maritime Master Radar is a study and revision tool for iPhone and iPad where you practise reading and plotting on a simulated display, work through ARPA exercises, scenarios and training packs, and review detailed session debriefs.

A friendly learner's guide to the IALA buoyage system. Meet lateral marks, cardinal marks and their link to the compass, and the two regions, then see how the IALA Buoyage app helps you study and test yourself for iPhone and iPad.

A friendly guide to five knots almost every sailor benefits from learning, including the bowline, clove hitch, round turn and two half hitches, figure of eight, and sheet bend, then how the Maritime Master Knots app helps you study them in animated 3D. A learning aid only.

Maritime Master OOW gathers navigation calculators, a watchkeeping reference library, exam practice and a private sea time log into one study companion for Officer of the Watch candidates and working deck officers. Available on iPhone, iPad and Android.

A learner friendly guide to tides: what causes high and low water, how spring and neap tides differ, and how the rule of twelfths estimates the height between them, plus how TideDeck and CalcDeck help you study and plan.

New to the water and keen to learn the theory? Here is a friendly, sensible order of study using our free and one-time-purchase apps, from broad foundations to focused topics like knots, buoyage, and the rules of the road.

Maritime Master is a free all-round learning companion for iPhone and iPad, bringing interactive tools, the rules of the road, seamanship, safety, meteorology, and exam practice into one app. It works offline, with content tiered from beginner topics up to advanced study.

A friendly tour of the whole Maritime Master family, from the free all round learning app to professional study tools, focused revision aids, practical calculators, and tides, so you can find the right one for the way you study.

TideDeck, the newest Maritime Master app, is now available on the App Store for iPhone and iPad. It computes tide times and charts for anywhere on Earth right on your device, offline, and it is designed as a planning and interest tool, not for navigation.

A conceptual study guide to how anchoring works and what scope means, written to build a firm foundation for learners studying seamanship.

Learn what a tidal stream is, how it differs from tidal height, and what a tidal stream atlas shows, with study tools in the free Skipper and CalcDeck apps.

Good news for deck cadets, officers in training, and OOW: Maritime Master – OOW is setting a course for Android on Friday, 5 December 2025. After a well-received launch on iOS, we’re bringing the same trusted toolkit to Android, complete with the features you’ve asked for: Advanced radar plotting simulator to build collision-avoidance instincts in a safe training environment. Bridge-ready calculation suite for speed–time–distance, ETA, dead reckoning, great circle/rhumb line,

We’ve got exciting news to share: our company has officially transitioned from Bottle Top Studios Ltd to Maritime Master Limited. This...

At Maritime Master, our mission has always been simple: to make maritime knowledge accessible, engaging, and effective, whether you’re...