How do you feel about my javadoc comments?

Is there anything I'm missing, or anything I should add? Do I need to comment non public/private variables, such as the instance of random called, or my main method variables? My teacher is super anal, and explained javadoc for less than 5 seconds. Surely appreciate it.

Code java:

package gps;
import java.util.Random;
 
/**
 * @author Jimbob
 * @version 1.0
 */
public class GPS
{
    /**
     * The name assigned to construct
     */
    private String name;
    /**
     *  Two part double value assigned to construct
     */
    private GpsCoordinates position;
    Random v1 = new Random();
 
    /**
     * Constructs a GPS from a GpsCoordinate and a string value.
     * @param n String name of GPS
     * @param pos the (x,y) value of GPS
     */
    public GPS ( String n, GpsCoordinates pos )
    {
        name = n;
        position = pos;
    }
    /*
     * Adds a random value between -2.5 and 2.5 to position
     */
    public void updatePosition()
    {
        position.setLatitude( position.getLatitude() - 2.5 + v1.nextInt(6) );
        position.setLongitude( position.getLongitude() - 2.5 + v1.nextInt(6) );
    }
 
    @Override
    /*
     * Converts GPS n to a string value
     * @return string value of GPS n 
     */
    public String toString()
    {
        return String.format( "%s: %s", name, position );
    }
}
 
package gps;
 
/**
 * @author Jimbob
 * @version 1.0
 */
public class GpsApp
{
    public static void main( String[] args )
    {
        GpsCoordinates saltLakeCity = new GpsCoordinates( 40.760671, -111.891122 );
        System.out.printf( "Gps coordinates of SLC: %s%n%n", saltLakeCity );
        GPS SLC = new GPS( "Garmin", saltLakeCity );
        System.out.printf( "myGps: %s%n%n", SLC );
        SLC.updatePosition();
        System.out.printf( "position update1:  %s%n", saltLakeCity );
        SLC.updatePosition();
        System.out.printf( "position update2:  %s%n", saltLakeCity );
        SLC.updatePosition();
        System.out.printf( "position update3:  %s%n", saltLakeCity );
    }
}