Now it is very easily to calculate ETA (Estimated Time of Arrival) of your desired ports. For Calculating this manually somebody mistake and somebody not well familiar how to get eta. Here It is made easy to Mariners and Shipping related personnel to get eta in a short time.
For Using this please see and select the box as required. Select Your departing sea port Time that is to select date and time of leaving that ports or started sailing. Select departing and arrival port zone time from dropdown and input box. Input prior your known distance value. This will calculate accurate ETA for you.