Samyung NAVIS 5100 Instruction Manual page 54

 Coastal line erase in SD card
)  [1.DATA]
(
)  [SD CARD]
(
( )
(It is available for only the model with SD slide)
)  [3.USER'S LINE]
(
)  Select the file name that you want to erase,
(
54
)  [5.ERASE]
(