4. SUMMARY 



a . Type of System 



(1) Precision ship-positioning and ranging. 



(2) Number of stations required for navigation: two remote 

 transponder stations placed at either end of a base line. 

 The mobile vehicle contains a single Interrogator station 

 which automatically ranges to each transponder in sequen- 

 tial fashion. 



(3) Carrier band: 3 cm (2900 - 3100 mc). 



(4) Radiated power: 200 mw, all solid state circuitry. 



(5) Antenna: omnidirectional or 60° beam width units integral 

 with equipment . Antenna and rf unit may be mounted up to 

 100 ft distant. 



(6) Modulation frequencies (automatically sequenced): 



Fine = 1.5 mc, ambiguities each 100 m 

 Intermediate = 150 kc, ambiguities each 1 km 

 Coarse = 15 kc, ambiguities each 10 km. 



(7) Number of simultaneous users: single (system may be 



expanded). 



(8) Readout: illuminated five-digit display for each range 



displayed simultaneously. 



(9) Auxiliary outputs: 20-line BCD suitable for data processing 



and x-y analog plotting equipment. 



(10) Maximum range rate: 80 knots (for automatic operation). 



(11) Integral voice transmit and receive facilities are provided 

 for check and calibration purposes. 



(12) Power requirements: 



Interrogator = 72 watts 6a @ 12 v dc 

 Responder = 36 watts 3a @ 12 v dc 



(13) Operating temperature: -10to+60°C. 



148 



artbur ai.lLtttlcilnr. 



