Range Day Beacons:

• two structures placed at different elevations, some distance apart.  (the front structure is lower than the rear),
  
• both have a vertical stripe centred on a contrasting background,
  
• when your vessel is positioned so that the stripes of the two structures line up, you are on the recommended track.
  

Posted Command & Warning Signs:

Usually they are posted on on the shoreline.  They include:

• No Wake Zone
  
• No Anchorage
  
• Speed Limit Zone
  
• Low-head Dam Hazard
  
• Power-line Hazard
  
• Pipe-line Hazard
  

Special Buoys:

Shapes have no significance.  They may have letters, but no numbers.  They (may) have a yellow X topmark.

Cautionary Buoy;

• Marks an area warning pleasure craft operators of possible dangers such as firing ranges, racing courses, seaplane bases, underwater structures, or areas where no safe through channel exists, and of traffic separations).
  
• Is coloured yellow,
  
• Displays identification letters,
  
• If it has a light, the light is yellow and flashing (once every 4 seconds).
  

Scientific Buoy  ODAS;

• ODAS, an Ocean (or Offshore) Data Acquisition System,
  
• Collects meteorological data (wind speed, water temperature, wave height and other scientific data,
  
• Is coloured yellow,
  
• If it has a light, the light is yellow and flashing (5 times every 20 seconds).
  

Shown at right is the southern Georgian Bay ODAS Buoy.
If you click on the picture, you can find out the current conditions, (available May - November)