45°22′42.3″N 75°37′32.8″W / 45.378417°N 75.625778°W / 45.378417; -75.625778 (CISS's broadcast location) CISS-FM (105.3 MHz) is a commercial radio station in Ottawa, Ontario.

The radio studios and offices are co-located with its sister stations at Thurston Drive and Conroy Road.

As of the fall of 2009, CISS has begun leaning towards a more rhythmic sound again, dropping most modern adult contemporary artists.

As of March 31, 2014, CISS faced additional competition from CKQB, which transitioned from active rock to a Top 40/CHR format.

CKQB's presentation heavily favours current rhythmic and dance products aimed at young adult and teen listeners.