Maritime Master - OOW

Study faster. Sail safer.

Practice radar plotting, run bridge calculations, and master COLREGs, all in one app built for OOW prep and day-to-day reference. Designed for deck cadets, maritime students, and working officers (OOW, 3/O, 2/O).

Radar plotting simulator:
Add multiple targets with custom courses and speeds
Automatic CPA/TCPA with clear high-risk warnings
Relative motion vectors and target trails to visualise situations
Training disclaimer: This simulator is for education only and must not be used for real-world navigation or collision-avoidance decisions.

Calculation suite:
Navigation: Speed–Time–Distance, ETA, Dead Reckoning, Course & Distance (Rhumb Line & Great Circle), Set & Drift & Fix Position
Terrestrial & Celestial: Compass Error, Parallel Indexing, Object Distance, Advance & Transfer, Meridian Passage & LOP sight-reduction helper
Stability & Ship Construction: FSE correction, Mean Draft, TPC/LCF usage, Trim & VCG
Meteorology: True Wind, Barometer corrections, Beaufort scale converter & Tides and Currents

Essential learning & reference library:
Regulations: SOLAS, MARPOL, STCW, ISM Code, ISPS Code, GMDSS (quick-reference guides)
Core nautical knowledge: Passage planning; ECDIS & charts; basic stability; compass deviation
Procedures: Emergency procedures; SOPEP & SMPEP; checklists for safe watchkeeping; logbook entries; equipment handover
Electronic navigation: AIS data interpretation; ECDIS functions; AIS/MMSI code reference

Master the Rules of the Road (COLREGs):
Shapes and sound signals
International Code of Signals (ICOS)
IALA buoyage systems (A & B)

Test yourself & prep for exams:
Flashcards, ICOS Hangman, and a Buoy Night-Light game
OOW progress tracker.

Who is it for?
Maritime students & deck cadets: build a strong foundation
Officers in training: prepare confidently for OOW certification
Active deck officers: quick reference, calculation practice, and knowledge refreshers
Anyone who wants to learn more about maritime and OOW

Download Maritime Master - OOW and advance your maritime knowledge with confidence.