Welcome to Grade 12 Nautical Science. This is where you bring it all together — advanced navigation, collision regulations, ship stability, and celestial observation. These lessons prepare you for your final exams and give you the knowledge to step confidently into a maritime career.
Grade 12 - Nautical Science
Final year. Exam-ready and sea-ready.
12 Introduction▼
1.1 Reduction of Sights▼
1.2 Compass error by astronomical observation▼
1.3 Radar▼
1.4 Electronic navigation systems▼
Electronic navigation systemsGyro compassShip's logEcho sounderRadarAutomatic radar plotting aid (ARPA)Automatic identification system (AIS)Global positioning systemElectronic chart display and information system (ECDIS)Radio direction finding system (marine radio beacons)Radar transponder beaconsOther electronic navigation systems
2 Seamanship▼
2.1 Stability of Vessels
Stability of vessels - concepts and definitionsStates of stabilityTrimEffect of the movement of cargo/ballast/personnelHull stressesLoadlines and zonesFreeboard and statutory freeboardZones/seasonal zones and areaLogbook entries2.2 Certificates to be carried
Certificates to be carried3 Meteorology▼
4 Communications▼
4.1 Global Maritime Distress and Safety System (GMDSS)
Global maritime distress and safety system: IntroductionConceptMarine communication areasOperational detailsRadio watchkeepingGMDSS sub-systemsGMDSS functionsMinimum operator requirements for vesselsKnowledge requirements of officersAvailability of equipmentNon-GMDSS vessels and radio communication servicesMaritime mobile service identity (MMSI) numbers52 lessons