### unique transits for org
      my $orguniq_rs = $org_rs->search( {}, {
                              group_by => [ qw/name/ ]
               }  );         

### unique transits for org type cargo
      my $one_rs = $orguniq_rs->search( {
                           'type' => { '=' => 'one' }
                        } );

### unique transits for org type tanker
      my $two_rs = $orguniq_rs->search( {
                           'type' => { '=' => 'two' }
                        } );

### unique transits for org type other
      my $other_rs = $orguniq_rs->search( {
                           'type' => { '!=' => [ 'one', 'two' ] }
                        } );