1. Basic electronics: Insulators and conductors \ Resistance \ Capacitance \ Inductance \ Semiconductors \ Signal shaping \ Operational amplifiers \ Transformers \ Amplifiers and oscillators \ Power supplies \ Digital devices and systems \ Displays \ Measuring instruments 2.Navigational Aids - theory and fault finding: Micro computers \ Gyro compass \ Autopilot \ Steering gear \ Echo sounder \ Speed log \ Automatic identification system (AIS) \ Long range identification and tracking (LRIT) \ Global positioning system (GPS) \ Differential GPS \ Loran C \ eLoran \ Radar \ Automatic Radar Plotting Aid (ARPA) \ Electronic chart display and information system (ECDIS) \ Voyage data recorder (VDR) \ Navtex \ Bridge equipment system level fault finding 3 - Radio Communications: Radiation and propagation \ Amplitude and angle modulation \ Radio transmitters \ Radio receivers \ Receiver characteristics \ Global maritime distress and safety system (GMDSS).