Air draft is defined as the clear height beneath a bridge, from the water surface to the underside of the bridge. Compare the current reading against your boat's air draft (waterline to its highest point) to see whether you will fit.

The M6 motorway bridge is the lowest Bridge in Athlone. If you clear it you will clear the railway, town and greenway bridges as well.

 

The readings Here are based on the OPW gauge upstream of Athlone lock and update through the day as the river rises and falls. Always check the air draft gauges at the bridge before you pass and ensure you have sufficient margin for error!