8-3A: Frequency and Wavelength

Question 1

8-3A l

Frequencies generally used for marine RADAR are in the ____ part of the radio spectrum.
A. UHF.
B. EHF.
C. SHF.
D, VHF

Answer 1

ANSWER C
VHF = 30 - 300 MHz
UHF = 300 - 3,000 MHz
SHF - 3,000 - 30,000 MHz
EHF : 30,000 - 300,000 MHz
The three marine RADAR bands are 2,0OO-3,100MHz, 9,300-3,500 MHz, and 14,000-14,050 MHz
All three marine RADAR bands fall into the super high frequency range of 3,000 - 30,000 MHz.
The most popular, X-band (S,300 - 9,500 MHz), is sometimes noted in gigahertz (9 3 - 9.5 GHz)

Question 2

8-3A3

An S-band RADAR operates in which frequency band?

A. 1 - 2 GHz.
B. 4 - 8 GHz.
C. 8 - 12 GHz.
D. 2 - 4 GHz.

Answer 2

ANSWER D
An S-band RADAR operates on the marine assigned frequencies 2,900-3,100 MHz. The S-band range is sometimes abbreviated 2 - 4 GHz.

Question 3

8-3A6

An X band RADAR operates in which frequency band?

A. 1 - 2 GHz.
B. 2 - 4 GHz.
C. 4 - 8 GHz.
D. 8 - 12 GHz.

Answer 3

ANSWER D
An X band RADAR operates from 9,300 to 9,500 MHz.