Longitude of the moons of Jupiter one could use their positions as a universal clock and this would make possible the determination of longitude, but the method he devised was impracticable for navigators on ships because of their instability. In 1714 the British government passed the Longitude Act which offered large financial rewards to the first person to demonstrate a practical method for determining the longitude of a ship at sea. These rewards motivated many to search for a solution. John Harrison, a self-educated English clockmaker, invented the marine chronometer, the key piece in solving the problem of accurately establishing longitude
Passenger from the "Equator" finds Ilmar on the shore of the stormy sea, who does not remember how he came to be in the water. Everything looks as if he fell into the water from the pier. Soon Ilmar and his new friends in the pioneer camp will again meet with the mysterious stranger ... Elena Kamburova — song "The Little Prince". Passenger from the "Equator" Passenger from the "Equator" () is a 1968 Soviet children's adventure film directed by Aleksandr Kurochkin. Young swimmer Ilmar sails on the ship "Equator" to the pioneer camp, located somewhere on the Black Sea shore. Accidentally, he witnesses