Count the number of rings between the center of the display and the target to measure the range to a target. The current interval is shown in the upper left position on the screen. The fixed range rings appear on the screen with a pre-determined interval depending upon the range scale in use and provide a rough estimate of the range to a target. RANGE MEASUREMENT: Measurement of range to a target can be achieved either by the fixed range rings or the Variable Range Marker (VRM). The range scale shown in the picture below is 6 miles and each fixed range ring is pre-determined at an interval of 1 mile.Ģ. The ‘+’ key increases the range whereas the ‘-’ key decreases the range. Use the RANGE key in the keyboard to select the range desired. The other radar can use a short range scale, which helps to detect smaller targets easily. Where two radars are used, one radar can be kept on a longer range scale to obtain advance warning of the approach of other vessels, changes in traffic density, or proximity to the coastline. CHOICE OF RANGE SCALE: Appropriate range scales should be used depending on the prevailing circumstances and conditions of the environment the ship is in. This article will help to understand the basic approach to the use of marine radar.ġ. Below attached is a picture of a radar screen and the keyboard. In this article, we would like to discuss how to interpret and understand a radar screen display. For reliable interpretation, it is essential that the radar operating controls be adjusted properly. Accidents can occur if the watch keeping officer is not fully conversant with the operation of the equipment. Proper use of radar and radar plotting aids in both restricted visibility and clear weather can help prevent collisions and ensure the safety of the ship. Needless to say, it’s of great practical value to the navigators. It is designed for detecting and tracking targets a considerable distance. The radar is one of the most used equipment systems onboard ships.

World of warships aim prediction