I te pūhoro Morse, e tohu ana te āhua "U" i te raupapa ..- E pā ana ki:
Ngā āwhā e rua (..) whai ake i te dash (-).
Arā, he rua ngā tohu poto (āwhā) whai ake i te tohu roa (dash). Ka whakamahia tēnei whakakotahi i te pūhoro Morse hei tohu i te āhua "U" i te telegrafi me te whakawhiti rōngia.