Constant speed
							                                
                                        
                                    
							                        
                    
                            Direct line of sight
							                                
                                        
                                    
							                        
                    
                            Close distance
							                                
                                        
                                    
							                        
                    
                            Safe distance
							                                
                                        
                                    
							                        
                     
	 
	