The National Research Council of Canada developed this unique version of a Searchlight Control Radar between 1942 and March 1944. It did not guide a searchlight directly like its British counterparts. Instead, an operator in the cabin could verify the target the radar was tracking through a window (not visible here) and the signals would be sent to a searchlight to aim it. During testing, it was found that the system could track so rapidly that the operators had motion sickness and development was abandoned.
Unknown Canadian Army photographer
Emailed from the NRC