🔍 Key Concepts

• Marine RADAR bands used in navigation (primarily X band and S band) • Approximate frequency ranges for S band vs X band • Relationship between frequency (GHz) and wavelength (cm) in RADAR

💭 Think About

• First, recall which two main frequency bands are standard for shipborne navigation RADAR, and which one is the higher-frequency, shorter-wavelength band. • Think about which band (S or X) is typically used for better target resolution and short-range detail, and which is better for long range and heavy rain. • Match that high‑resolution band to its usual frequency range in GHz, then see which answer choice best fits that range.

✅ Before You Answer

• Verify the typical S band RADAR range (in GHz) and make sure you are not mixing it up with X band. • Confirm which is the higher frequency band between S and X in marine use; X band should have the shorter wavelength (about a few centimeters). • Check that the frequency range you pick is consistent with common references for X band RADAR used on merchant ships.