| 摘要 |
PURPOSE:To present a figure similar to actual one underwater in indicated width distancewise by intensively indicating detected information signals in which an indicated image by one indication line of a raster scanning corresponds to a unit distance. CONSTITUTION:With a controlling means 6, a reading signal (e) is outputted to control the contents stored in a memory means 3 in reading so that each memory inputted information (b) is indicated on one indication line of an indication sweep, namely a raster scanning while a sweep signal (f) is outputted to control a raster scanning so that it is subjected to the sweep of an indication means 5, namely the deflection of electron beams to coincide the indication. Then, a unit distance detecting means 8 generates a unit signal each time detecting an intended unit distance by a distance entry signal (h) and outputs as a unit distance entry signal (d). |
