Welcome to Grade 11 Nautical Science. Build on your Grade 10 foundation with more advanced navigation, astro-navigation, weather systems, and maritime safety. These lessons take you closer to understanding how real-world seafaring works — from charting a course to reading the skies.
Grade 11 - Nautical Science
Going deeper. From theory to open water.
11 Introduction▼
1 Navigation▼
1.1 Sailings
Introduction to sailingsParallel sailingPlane sailingMercator sailings1.2 Astro navigation - geographical position and the nautical almanac
Astro navigation - the celestial sphereDeclinationHour angleGeographical position1.3 Rising and setting phenomenon
Sunrise and sunsetTwilight1.4 The marine sextant
The marine sextantUses of the sextantParts of the sextantSextant case and accessoriesHousing the sextantReading the sextantSextant errors and their correction1.5 Altitude correction
IntroductionObserved to true altitudeSextant altitudeDip and apparent altitudeRefractionCorrection for semi-diameterParallaxTotal correction and true altitude1.6 Determination of latitude at noon
Meridian passageTime of meridian passageFinding the latitudeProcedure to find the latitude of the observer at meridian passage1.7 The tides
Tides and the cause of tidesTide tablesDefinitionsUse of the tide tables1.8 Currents and tidal streams
Currents and tidal streamsDefinitionsPlotting symbolsFinding the set, rate and drift of a currentFinding the estimated position (EP) allowing for a currentFinding the course to steer in order to counteract the currentLeeway2 Seamanship▼
2.1 Cargo handling
Cargo handling equipmentCargo working gear.ContainersBlocks and tacklesPurchases and tacklesMechanical advantage2.2 International regulations for the prevention of collision at sea
International regulations for the prevention of collision at sea (1972): Part A - GeneralPart B - Steering and sailing rules - Section ISection II: Conduct of vessels in sight of one anotherSection III: Conduct of a vessel in restricted visibilityPart C: Lights and shapesPart D: Sound and light signalsDistress signals2.3 International Association of Lighthouse Authorities system of buoyage
International Association of Lighthouse Authorities (IALA) Buoyage System - IntroductionBuoyage regionsDescription of the systemLateral marksCardinal marksIsolated danger marksSafe water marksSpecial marksNew dangers2.4 Safety at sea – emergency procedures and boat handling
Emergency procedures and boat handling: Stopping a vesselMethods of stopping a vesselAnchoringSearch and rescueRescue plansRecovery of persons falling overboardBoatwork in heavy weatherShip disabled or in distressRescuing the crew of a disabled shipDistress signalsAbandoning shipGroundings, collisions and heavy weather damageBeachingControl of fire at seaTowing3 Meteorology▼
4 Communications▼
92 lessons