Raymarine i40 Bi-Data with Thru-Hull Transducers Raymarine i40 Bi-data System The i40 Bi-Data gives you all the information power of the individual i40 Speed and i40 Depth units Provides independently selectable speed and distance units, shallow alarms and resettable minimum-depth memory, deep and shallow anchor alarms and water temperature information Display can be used as a repeater for depth, speed and temp Raymarine, the world leader in marine electronics, develops and manufactures the most comprehensive range of electronic equipment