[电] radar and television aid to navigation

háng xíng de léi dá hé diàn shì fǔ zhù ㄏㄤˊ ㄒㄧㄥˊ ㄉㄜ˙ ㄌㄟˊ ㄉㄚˊ ㄏㄜˊ ㄉㄧㄢˋ ㄕˋ ㄈㄨˇ ㄓㄨˋ