Sonar (ùi Eng-gí "sound navigation and ranging" lâi--ê) sī 1 chióng lī-iōng siaⁿ-im (sound) tī chúi--nih thoân-pò ê ki-su̍t, ēng lâi kiâⁿ-chûn (navigation) iah sī cheng-chhek pa̍t chiah chûn-chiah. Sonar ū chú-tōng kap pī-tōng 2 chióng.[1]

Chú-tōng sonar ê goân-lí
  1. Wragg, David W. (1973). A Dictionary of Aviation (first pán.). Osprey. p. 245. ISBN 9780850451634.