Marine GPS & Radar Navigation Techniques
- What is Differential GPS (DGPS)
and how is it used in marine navigation?
DGPS improves positional accuracy by using a fixed reference station to correct GPS signals, reducing errors to a few centimeters. - What is Real-Time Kinematic (RTK)
GPS?
RTK provides high-precision positioning using carrier-phase measurements and a base station, commonly used in hydrographic surveying. - How is Marine GPS integrated with
sonar and chart plotters?
GPS data is combined with depth readings and electronic charts for accurate navigation and mapping. - What are common sources of GPS
errors in advanced marine applications?
Satellite geometry, multipath reflections, ionospheric and tropospheric delays, and equipment errors. - What is the role of GNSS systems
besides GPS?
Systems like GLONASS, Galileo, and BeiDou provide additional satellites to improve accuracy and reliability. - How is Marine GPS used for
offshore surveying and hydrographic mapping?
It provides precise vessel positioning for charting the seabed, coastal monitoring, and offshore engineering projects. - How do you troubleshoot advanced
GPS errors?
By checking satellite signals, using DGPS corrections, verifying equipment calibration, and monitoring environmental factors. - What is radar and how does it
work?
Radar (Radio Detection and Ranging) uses radio waves to detect objects, measure distance, and determine speed by analyzing reflected signals. - What are the main applications of
radar?
Navigation, weather monitoring, air traffic control, maritime safety, and military surveillance.