Approximately at what speed does the antenna...

Question 1 / 27070vsLT9GOo4pKyHYx3gJHj

Question 1 of 27070vsLT9GOo4pKyHYx3gJHj

Approximately at what speed does the antenna of a navigational radar rotate?

Question 1 of 27070

Approximately at what speed does the antenna of a navigational radar rotate?

🔍 Key Concepts

• Typical marine navigational radar scanner (antenna) rotation characteristics • Trade-off between rotation speed and target update rate on the screen • Effect of too-slow vs too-fast RPM (revolutions per minute) on target detection and display clarity

💭 Think About

• Which RPM range would allow the radar to refresh the picture often enough for safe navigation without overloading the system or blurring the display? • If the antenna rotated very slowly, what would that do to the update rate of targets (especially close-range traffic)? • If the antenna rotated very fast, what practical problems (mechanical and display-related) might limit how fast manufacturers choose to run it?

✅ Before You Answer

• Compare the given RPM ranges with what seems mechanically reasonable for a rotating mast-top scanner in rough seas • Think about how frequently a navigator needs the radar picture to update (every few seconds vs once per minute) • Eliminate options that seem too slow to be useful or unnecessarily fast for normal marine radar operation

Question 1 of 27070

Approximately at what speed does the antenna of a navigational radar rotate?

At speeds ranging from about 6 to 19 RPM

At speeds ranging from about 6 to 15 RPM

At speeds ranging from about 15 to 30 RPM

At speeds ranging from about 20 to 40 RPM

Question 1 / 27070vsLT9GOo4pKyHYx3gJHj

Question 1 of 27070vsLT9GOo4pKyHYx3gJHj

Approximately at what speed does the antenna of a navigational radar rotate?

Back

Question 1 of 27070

Approximately at what speed does the antenna of a navigational radar rotate?