At 15.585-tons this ship is the largest that can be dived in south Devon waters. She was used as a gunnery target and sunk in 1913. The wreck lies upside down and has been rated as a 'fabulous' dive. The depth to the keel is just under 30 metres and it is 44 metres to the sea bed.
follow this link for drawing and more info.
http://www.divernet.com/Wrecks/wreck_tours/159408/wreck_tour_70_hms_empress_of_india.html