How to check/calculate efficiency of Radar ?

  1. Switch on the radar set and get a picture.
  2. Change over to the range scale specified by the manufacturer (usually the 1.5M range scale).
  3. See that the PL selector switch is in the ‘short pulse’
  4. Set the clutter suppression and differentiator controls to minimum or off positions.
  5. Set gain as usual.
  6. Operate spring loaded “performance monitor” switch and a feather or a cartwheel – pattern will appear on the screen.
  7. Measure off the maximum length of the feather (or the maximum radius of the cartwheel) with the help of the VRM. Any error of the VRM must be allowed for.
  8. Relative efficiency % = (present length of feather/ maximum length in the past result) * 100

Results  below 80 % is  unreliable,

 Efficiency (%) = (Present length of plume/maximum length in as per manufacturer) x 100
Note:                                                 

The length of the plume is usually measured on the 1.5M range scale, unless otherwise indicated by the manufacturer, using the variable range marker.

AWDHESH KUMAR
Related Searches:
  1. What is radar and its principle in detail? 
  2. What factors affect maximum range of RADAR?
  3. What are unwanted echoes and signals appear on Radar screen?
  4. What are errors of/in Radar ?
  5. Where Radar antenna be placed / kept onboard?
  6. Why S-band radar is suitable for long range detection than X – band radar?
  7. How Radar is set up for operation /What are method of setting up a Radar?
  8. How to check/calculate efficiency of Radar?
  9. What are controls of RADAR?
  10. What are IMO Performance Standard for RADAR?
 

About Us

Marinegyaan.com is not just another website; it’s a mission to create World’s Biggest Online Marine Encyclopedia for the World and to find solutions that are of extreme importance to all seafarers across the globe.

Marine Gyaan Encyclopedia is a free online resource aims to document all maritime subjects and queries to replace bulky reference books. It is a benevolent reference work for Maritime community in an exhaustive manner. Our encyclopedia covers a great collection of study materials and detailed notes in subjects such as Navigation, Cargo work, Ship operation technology, Meteorology, ROR and Ship Stability etc. Searchable index include more than 2000 nautical topics in expected MMD written and oral exams with pinpoint answer, making our site a good all around tool for MMD exams preparation.

The collaborative and constantly updated encyclopedia is free for everyone to use and perfect for candidate who are preparing for MMD written or oral exams such as Second mate, Chief mate or Masters. All of the entries have been written and approved by actual scholars, which means you won’t have a problem when it comes time to cite sources. In addition to our massive store of reference material for fellow mariners, we are providing online bookings  for various Maritime courses in maritime institutes across India.

Join Us

Twitter Facebook Linkedin
Copyright Marinegyaan © 2020. All Right Reserved | Designed By 360 Website Design
error: Content is protected !!