Laboratory 1: Navigation. 1 - Navigation Basics 2 - Global Positioning System (GPS) 3 - Exercise. Latitude and Longitude. Imaginary lines divide the globe into degrees. 180 ° of longitude East and West 90° of latitude North and South. Distance. 1 ° = 60 nautical miles* (1 nmi = 1.15 mi)
1 - Navigation Basics
2 - Global Positioning System (GPS)
3 - Exercise
1 statute mile = 5280 feet
1 nautical mile = 6072 feet
*True on Mercator Projections, lines of longitude, the equator, and great circles.
help determine a safe course, such as buoys, or beacons.
horizontal angle from a line of reference.
differs from the original by 180 degrees.
Satellites providing a fix
Poor reception in shaded area.
A differential GPS is one that entails a separate radio receiver to correct position
Bearing = Where waypoint is relative to your position
Heading = Direction you are going
Speed = Speed over ground
Distance = Distance to waypoint
Track plotters create routes on the basis of time or distance intervals
Cross tracking error
decimal degrees or meters.
To export information to GIS (global
information systems) formats, data must be collected in decimal degrees with at least 5 significant digits.