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Navigation-related Symbols

GUIDELINES FOR THE PRESENTATION OF

 

NAVIGATION-RELATED SYMBOLS, TERMS AND ABBREVIATIONS

 

 

1 The Sub-Committee on Safety of Navigation (NAV), at its fiftieth session (5 to 9 July 2004), agreed on Guidelines for the presentation of navigation-related symbols, given in annex 1, and terms and abbreviations, given in annex 2, and that they should be used for the display of navigation-related information on all shipborne navigational equipment and systems in consistent and uniform manner.

 

2 The Maritime Safety Committee, at its seventy -ninth session (1 to 10 December 2004), concurred with the Sub-Committee's views, approved the annexed Guidelines and encouraged their use for all shipborne navigational systems and equipment.

 

3 Member Governments are invited to bring the annexed Guidelines to the attention of all concerned.

 

 

***

 

 

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ANNEX 1

 

Guidelines for the Presentation of Navigation-related Symbols

 

 

1 Purpose

 

The purpose of these annexed guidelines is to provide guidance on the appropriate use of navigation-related symbols to achieve a harmonized and consistent presentation.

 

2 Scope

 

The use of these guidelines will insure that the symbols used for the display of navigation-related information on all shipborne navigational systems and equipment are presented in a consistent and uniform manner.

 

3 Application

 

These guidelines apply to all shipborne navigational systems and equipment. The symbols listed in the appendix should be used for the display of navigation-related information to promote consistency in the symbol presentation on navigational equipment.

 

The symbols listed in the Appendix should replace symbols which are currently contained in existing performance standards. Where a standard symbol is not available, another symbol may be used, but this symbol should not conflict with the symbols listed in the appendix.


 

 

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ANNEX 1

Page 2

 

 

APPENDIX

 

Navigation-related Symbols

 

Table 1: Own Ship Symbols

Topic   Symbol Description  
           
        Double circle, located at own ship’s reference position.  
Own ship     Use of this symbol is optional, if own ship position is  
    shown by the combination of Heading Line and Beam  
        Line.  
           
Own Ship True     True scale outline located relative to own ship’s  
    reference position, oriented along own ship’s heading.  
scale outline     Used on small ranges/large scales.  
         
           
Own Ship Radar       Cross, located on a true scale outline of the ship at the  
    physical location of the radar antenna that is the current  
     
Antenna Position      
    source of displayed radar video.  
         
           
Own Ship Heading     Solid line thinner than the speed vector line style, drawn  
    to the bearing ring or of fixed length, if the bearing ring  
line      
    is not displayed. Origin is at own ship’s reference point.  
         
           
Own Ship Beam     Solid line of fixed length; optionally length variable by  
line      
    operator. Midpoint at own ship’s reference point.  
         
           
        Dashed line – short dashes with spaces approximately  
        twice the line width of heading line.  
Own Ship Speed     Time increments between the origin and endpoint may  
    optionally be marked along the vector using short  
vector     intersecting lines.  
        To indicate Water/Ground stabilization optionally one  
        arrowhead for water stabilization and two arrowheads for  
        ground stabilization may be added.  
           
Own Ship Path     A curved vector may be provided as a path predictor.  
prediction      
       



 

 

Thick line for primary source. Thin line for secondary

Own Ship source.

Past Track

Optional time marks are allowed.


 

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ANNEX 1

Page 3

 

 

Table 2: Tracked Radar Target Symbols

Topic Symbol Description  
             
          Solid filled or unfilled circle located at target position.  
          The course and speed vector should be displayed as  
          dashed line, with short dashes with spaces approximately  
Tracked Target         twice the line width.  
including         Optionally, time increments, may be marked along the  
Dangerous Target         vector.  
          For a “Dangerous Target”, bold, red (on colour  
          display) solid circle with course and speed vector,  
          flashing until acknowledged.  
             
Target in         Circle segments in the acquired target state.  
        For automatic acquisition, bold circle segments, flashing  
Acquisition State          
         
          and red (on colour display) until acknowledged.  
           
             
             
Lost Target         Bold lines across the circle, flashing until acknowledged.  

 

 

Selected Target             A square indicated by its corners centred around the  
             
             
            target symbol.  
               
               
                 
                 
                 
Target Past           Dots, equally spaced by time.  
Positions            
             
                 
Tracked Reference   R Large R adjacent to designated tracked target.  
  Multiple reference targets should be marked as R1, R2,  
Target    
      R3, etc.  


 

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ANNEX 1

Page 4

 

Table 3: AIS Target Symbols

 

Topic         Symbol Description  
                       
                    An isosceles, acute-angled triangle should be used. The  
AIS Target                   triangle should be oriented by heading, or COG if  
                  heading missing. The reported position should be  
(sleeping)                   located at centre and half the height of the triangle. The  
                    symbol of the sleeping target should be smaller than that  
                    of the activated target.  
                       
                    An isosceles, acute-angled triangle should be used. The  
                    triangle should be oriented by heading, or COG if  
                    heading missing. The reported position should be  
                    located at centre and half the height of the triangle.  
                    The COG/SOG vector should be displayed as a dashed  
                    line with short dashes with spaces approximately twice  
                    the line width. Optionally, time increments may be  
Activated AIS                   marked along the vector.  
                  The heading should be displayed as a solid line thinner  
Target                    
Including                   than speed vector line style, length twice of the length of  
Dangerous Target                   the triangle symbol. Origin of the heading line is the  
                    apex of the triangle.  
                    The turn should be indicated by a flag of fixed length  
                    added to the heading line.  
                    A path predictor may be provided as curved vector.  
                    For a “Dangerous AIS Target”, bold, red (on colour  
                    display) solid triangle with course and speed vector,  
                    flashing until acknowledged.  
                       
                    A true scale outline may be added to the triangle  
                    symbol. It should be:  
AIS Target – True                   Located relative to reported position and according to  
Scale Outline                   reported position offsets, beam and length. Oriented  
                    along target’s heading.  
                    Used on low ranges/large scales.  
                       
Selected target                   A square indicated by its corners should be drawn  
                   
                   
                  around the activated target symbol.  
                     
                       
                       
                       
                       
                    Triangle with bold solid cross. The triangle should be  
                    oriented per last known value. The cross should have a  
Lost target                   fixed orientation. The symbol should flash until  
                  acknowledged.  
                    The target should be displayed without vector, heading  
                    and rate of turn indication.  
                       
Target Past                   Dots, equally spaced by time.  
Positions                    
                     
                       


 

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ANNEX 1

Page 5

 

 

Table 4: Other Symbols

 

Topic       Symbol Description  
                                       
AIS Based AtoN                                   Diamond with crosshair centred at reported position.  
Real Position of                                   (Shown with chart symbol. Chart symbol not required  
                                   
                                   
Charted Object                                   for radar.)  
                                       
AIS Based AtoN                                   Diamond with crosshair centred at reported position.  
                                   
Virtual position                                    
                                   
                                     
                                     
                                       
Monitored Route                                   Dashed bold line, waypoints (WPT) as circles.  
                                       
Planned or                                   Dotted line, WPT as circles.  
Alternate Route                                    
                                     
                                       
Trial Manoeuvre                                   Large T on screen.  
                                   
                                       
                                       
Simulation Mode             S Large S on screen.  
                 
                                       
Cursor                                   Crosshair (two alternatives, one with open centre).  
                                   
                                     
                                     
                                     
                                       
                                       
Range Rings                                   Solid circles.  
                                       
Variable Range                                   Circle.  
                                  Additional VRM should be distinguishable from the  
Markers (VRM)                                    
                                    primary VRM.  
                                       
Electronic Bearing                                   Dashed line.  
                                  Additional EBL should be distinguishable from the  
Lines (EBL)                                    
                                    primary EBL.  
                                       


 

 

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ANNEX 1

Page 6

Topic Symbol Description
     
Acquisition/   Solid line boundary for an area.

Activation Area

 

 

Event Mark   Rectangle with diagonal line, clarified by added text  
  (e.g. “MOB” for man overboard cases).  
     

 

***


 

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ANNEX 2

 


Date: 2016-03-03; view: 1009


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