Waterways have always been an important mode of transport in Kerala. The total length of navigable route in Kerala was 1,900 kilometres and the navigable rivers constitute about 54 per cent of the waterways. The 41 West-flowing rivers together with the backwaters are an integrated part of the inland navigation system in Kerala. In Kerala water transportation through these channels are mainly small distant passenger services, informal country boats, freight transportation to PSU's such as Fertilisers and Chemicals Travancore, Kochi etc.