In the CONTROLLER 
	  		   
   function  DiveSites() {
			$DiveSites = DataObject::get("DiveSitePage",
									  "",
									  "RAND()",
									  "",
									  "3"); 

//		Debug::show($DiveSites)
	 	return $DiveSites;
	  
   }	 

In the TEMPLATE 

 <% control DiveSites %>

         <div id="TasmanianDiveSiteSummaryHomePage"  >
         
            <% control MainImage %>
                     <% control SetWidth(50)  %>
                                      <a href="$Top.Link" > <img src="$URL" alt="Image of the $Top.Title"/ class="left"> </a>
                     <% end_control %>
           <% end_control %>
                                              
 
        	  <div class="Summary">
            <h4>$Title</h4>
           <div class="SummaryText"> $Summary</div>        
          <p> 
 	         <a href="$Link" title="Find out more about this dive site &quot;{$Title}&quot;">Find out more about this dive site </a>
          </p>
          </div>
          
        </div>
        
 <% end_control %>

For using in Silverstrip CMS

Get 3 random objects for display on a Silverstrip template

PHP