The navigation then passes to the east of Southampton Airport, while further east is the river channel and the Itchen Valley Country Park. Between the two waterways is Decoy Covert, a small wood which contained a duck decoy. The lock nearby is called Decoy Pond Lock, below which is Sandy Lock. There is little water in this section, since its main supply has been cut off, and although there are springs along this section, the channel is periodically blocked where occupation bridges have been replaced by earth embankments. Sandy Lock has much barbed wire in it, possibly dumped when the wartime defences of the airport were dismantled. The final lock on this section is Mans Bridge Lock, shortly after the modern crossing by the M27 motorway. The cut then rejoins the main river, and passes under the A27 road. The current bridge was constructed in 1975, and replaced a bailey bridge erected during the Second World War. Just below it is a single arched stone bridge dating from the early nineteenth century, which was the original course of the road. It has been restored and is used as a footbridge.