Original: These regulations introduced three new Morse code sequences, including the SOS distress signal: Ruhezeichen ("Cease-sending signal"), consisting of six dahs ( — — — — — — ), sent by shore stations to tell other local stations to stop transmitting.
Simplified: They introduced three new Morse code sequences, including the SOS distress signal: Ruhezeichen ("Cease-sending signal"), consisting of six dahs ( — — — — — — ). The signal was sent by shore stations to tell other local stations to stop transmitting.