GPS & Electronic Navigation Aids Flashcards
What does GPS Stand
Global Positioning System
What does GNSS stand for?
Global Navigation Satellite System
What does AIS stand for?
Automated Identification System
How does AIS work?
A vessel transmits data on itself via VHF and GPS and then this information is displayed on a screen
Name three pieces of information you could find on a vessel on an AIS display?
Name, Callsign, Status, Destination, Type, Speed/Direction, Size, Received
How does Radar work?
Radar sends out a rotating beam of radio frequency waves and captures the echoes back then displays them on a screen
Why is it better to have the aerial mounted as low as possible on the vessel?
The signal strengths are quite week in GPS
True or False?
You should ensure your GPS in on the same datum as your chart
True
What is a waypoint?
Any spot on a chart that you want to use for navigation
What is the symbol for a waypoint?
A square and a cross combined
True or False?
You can string a series of waypoints together to define a route
True
What is the Cross Track Error (XTE)?
It tells us how far off course we are
What are the two ways in which I can use XTE to stay on course?
XTE Alarm
XTE Ladder
When would GPS Web be useful?
High speed navigation
