The space between two words is equal to five dot units. It all depends on your imagination and experience gathered listening to Morse code transmissions over your radio or from a pre-recorded cassette player. Learning to send Morse code using a Morse Key is far more easier once somebody demonstrates it to you. Once you get your license and the callsign, it is time for you to start transmission. It is not a directional call.
Directional call is given to a definite station or definite country .
In the above message station 4S7VK is being replied back by station VU2XYZ with an exchange of signal report and his name and location. To overcome this, modulated code tones are transmitted. The situation is now that under severe conditions of fading, the carrier frequency may fade out completely but one or the other sideband may remain strong, as a result a continuously readable signal is received.