Page 6
Copyright
W
ORKSHEET
2: C
OMMUNICATION
DEVICES
Q1. Distinguish between three types of radio with respect to their range , effectiveness in coordination and safety Page 14)
Q2. List the information contained in a DSC alert (Page 14 and 15)
Q3. Complete the diagram below of radio frequencies to distinguish between frequency type, name and use (Page 15)
27 mHz marine
channels
Extremely
high
frequencies
(EHF)
VHf marine
channels
Inmarsat satellite
frequencies
Super high
frequencies
(SHF)
Ultra high
frequencies
(UHF)
Very high
frequencies
(VHF)
High
frequencies
(HF)
Medium
frequencies
(MF)
Infra red,
ultra violet
and x-rays
FREQUENCY
TYPE
AND NAME
DEFENCE FORCES
USE
MEDICAL
SCIENTIFIC
Cb radio
Q4. Explain what an EPIRB is, what it is designed to do and how it is used in coordination and rescue (Page 16)
Q5. Explain how flares are ignited, and distances they can be seen in distress situations (Page 17)
