Reverberation was measured from smooth young ice and from heavily rafted winter ice in the Canadian East Coast waters. “Point” charges were used as sound sources and an omnidirectional hydrophone as the receiver. Backscattering strengths were measured in octave bands from 0.4 to 25.6 kc/sec over a range of grazing angles from 15° to 60°. The scattering strengths for the rough ice are approximately equal to the smallest that have been reported for Arctic ice and are substantially greater than those measured for the smooth ice. Values previously reported for young broken and refrozen ice in the Gulf of St Lawrence generally fall between those measured for the rough and smooth ice. There is little variation of scattering strength with frequency for either rough or smooth ice.