MALAGASY NATIONAL POLICE

2. Manual sending radiotelegraph is the normal mode of operation,
although some radiophone is used by officia . Presenty used low power
radiophone equipment does not 'satisf~totilyp vide speech -capability,
nor does.it provide any' security factor for offdi. 1'codniersations. Some
traffic is enciphered for security reasons, but'i -geiieral, traffic load
is light, amounting to perhaps '30 messages per day at Tananarivec. .
3. It is estimated that it would cost at least $100,000--to replace
,the existing system with new equipment of adequate power using similar
transmission modes (manual OW and Radiotelephone). A modern network
utilizing Single Side BandI*(SSB) transmission for more secureovoice.and
-long-distance mobile communications could be procured for less than -two­
thirds of the' cost mentioned above.' A relatively new techniqite, the Sin­
gle Side Band transmission provides a more effective speech-capability
than the former Amplitude Modulated (AM) 'method*. In addition, it pro­
vides a good degree of security of traffio' because the average bhort
wave receiver does not receive SSB, 'oi .only with great. difficulty. Such
SSB equipment is compact, simple to operate and requires much less power
for effectiveness. The usual SSB equipment can be quickly and easily
switched from SSB to telegraph.
4. Should it become possible to provide the National Police with a
new SSB network, it would also be advisable to supply them with a small
stock of replacement tubes and repair-parts.for the 5 RGA 200 Watt trans­
mitters now in service. This equipment could serve very well for many
years with reasonable care as stand-by or emergency units in the Pro-,
vincial Capitals.