Hey
There are two ferry points (called jetties) in Ernakulam, the Ernakulam Jetty and the High Court Jetty. The first boat leaves around 6 am and the last boat leaves around 9pm. Between the first and last service to Fort Cochin, expect a service every 15-30 minutes And charge for ferry is rs 5-7 (aproxx). Happy travelling ☺
For reaching Fort Cochin from Ernakulam city by ferry , you may reach the government boat jetty near Subhash park ( or south of Marine drive ) If you are arriving by train at Ernakulam junction or town you can take a prepaid rickshaw till the boat jetty and board the boat after purchasing the ticket from the counter The ticket cost is approx 7-10 Rs per person