Radar image of specially selected, more typical and easily identified areas of coastal features is charted on the map as additional loading. Radar image is combined with cartographic one which facilitates radar markers' identification and their use for navigation. Radar survey was made at a 4 - 10 mile distance from a coast line with the use of regular ship radars. The height of the aerial is 18m. Repeated observations show that outlines of radar markers on radar screen are practically not depend on a season and 24 hours. They stay enough stable with the distance and direction change. 
There is a description of radar markers below. The names of markers coordinate with geographical names or spot elevations of relief elements; radar markers without names or spot elevations are markers with numbers: the first two figures of a number - degrees, the last two - parallel minutes, on which there is a radar marker.


                                 DESCRIPTION OF RADAR MARKERS
 
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Markers Names                  Conditions of the precise identification
or Numbers                     (The distances show on what removal from the coast
                               can be markers used)
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5134, 5139, 5142               From N and W, 8 - 10 miles
      5148                     From S and W, 8 - 10 miles
      5158                     From N and W, 10 - 12 miles
   5205 - 5207                 From S and W, 10 - 12 miles
Mountains Ipel'ka and          From W 20 - 25 miles
Malaya Ipel'ka (slopes) 
   5218 - 5228                 From all directions, 15 - 20 miles
   5231 - 5235                 From all directions, 20 - 22 miles.
                               Highly reliable, good identified markers.
                               Are recommended when approaching from the sea.
Mountains Bol'shaya Ipel'ka    From all directions, 15 - 25 miles
(slopes)
   5242 - 5246                 From all directions, 12 - 15 miles
   5247 - 5257                 From all directions, 15 miles. Especially reliable when approaching from S.
   5256 - 5315                 Are handly identified when approaching from the sea. Can be used when sailing in 
                               6 - 8 miles from the coast. Mountain Kedrovaya, Mountain Kruglyy Les (south slope),
                               Mountain Belaya. heigts 41m and 49m are identified from 10 - 15 miles distance, but                                    their use reguires some experience.
   5318 - 5324                 From all directions, 8 - 10 miles.