Ian Waugh - A Mariner\'s Guide to Marine Communications

A Marine VHF Radio can be used for:

Inter-ship communications.

Pilots/Ports/VTS communications.

Distress, Urgency and Safety communications.

'Link calls' through Coast Radio Stations.

Passing information to Ship Reporting Systems through MRCC/CRS.

Marine VHF radio installation, with DSC

A typical VHF installation might include the components shown

in figure 6.2.

DECK

receiving

antenna

\

screw

connectors

at antenna

base

deck glands

or thru·deck

'" ~ connectOrS '\. /

antenna

main

antenna

ABOVE DECK EQUIPMENT

BELOW DECK EQUIPMENT

"I' connections \ I' ~,

'" " ,....--=./_".:.....---,.~-- - - - - - - - - - -, ( , , ,

Ch 70 Watch transmitter Main VHF loudspeaker : ' , ," speaker remote

reciever

receiver '- -l ...!

...--'-~_--LT--, U'III!

DSC controller

L-~~=iW~d::ke:yp::a:d::~ __ ~~ .. ------... ------~~r~~~e '

, ~ , handset-'

., remote', ... - - -'

I, handset-'

---_ ...

~-----I , AC / DC j" - - - )

main

, rectifier "r----r'" .. - - - - -- handset

,

6 6

AC supply

~ ..

12124 volt

DC supply

Figure 6.2

A Marine VHF Installation

basic installationD

optional --__ extras 1 r - -, I

, ,

The three main components of the VHF installation are:

The VHF radio transceiver.

(a combined transmitting and receiving unit)

• A Digital Selective Calling (DSC) Controller.
  A Channel 70 Watch Receiver.

128 THE NAUTICAL INSTITUTE