The program for the calculation of ETA vessel

The program is designed to calculate the ETA ship with the distance, speed boat and jet lag, as well as for calculating the required boat speed to stay just in this period. The program is useful for the watch captains and assistants of all types of vessels, and in particular will be useful for container and passenger ships to calculate the speed of approach to the port. English Language Program. Very easy to use. I hope will be useful to everyone!