Topic practice — Navigation B — Instruments

Focused practice on one topic, with instant feedback after every question.

The topics

• Radar (17 questions) — Range, discrimination, controls and detecting risk of collision
• Radio communications (50 questions) — VHF, channels, antennas, DSC and calling procedures
• NAVTEX (11 questions) — Reception, frequencies, the transmitter network and message types
• Distress and rescue (30 questions) — MAYDAY, PAN-PAN, EPIRB, SART and GMDSS
• Compasses (18 questions) — Magnetic, gyro, fluxgate, deviation and variation
• GPS (11 questions) — Initialising, controls, accuracy and speed over ground
• Echo sounder (14 questions) — The transducer, its care and comparing the sounding with the chart
• Time and time zones (10 questions) — UTC, zone time, local time and the date line
• Stars and sky (13 questions) — The Pole Star, constellations and the sun's motion
• The earth and charts (14 questions) — Latitude and longitude, the nautical mile and distances