The canal is 193.30 km (120.11 mi) long, 24 m (79 ft) deep and 205 metres (673 ft) wide as of 2010. It consists of the northern access channel of 22 km (14 mi), the canal itself of 162.25 km (100.82 mi) and the southern access channel of 9 km (5.6 mi). The canal is a single lane with passing places in the "Ballah By-Pass" and the Great Bitter Lake. It contains no locks; seawater flows freely through the canal. In general, the canal north of the Bitter Lakes flows north in winter and south in summer. The current south of the lakes changes with the tide at Suez.
Try to answer this question if possible (otherwise reply "unanswerable"): What direction does the canal north of Bitter lakes flow?
north in winter and south in summer