(7) Power requirement: 12 v or 24 v dc. 



(8) Range: 40, 000 meters (25 miles). 



(9) Range (minimal): 125 meters, limited by overloading. 

 Accuracy: ± 0.33 - 0.50 meters with correction for 

 refractive index. 



(10) Antenna: 20° beam width conical (standard); others 

 available . 



(11) Pattern frequencies: 



Master Remote 



A pattern 1.49847 mcps A-1 .49947 mcps 



A+1. 49747 mcps 



C pattern 1 .48349 mcps 1 .48249 mcps 



D pattern 1.34862 mcps 1.34762 mcps 



(12) Readout: transit time in Nano seconds from master to 

 remote station indicated as circular trace on cathode - 

 ray tube and directly on mechanical or servo-driven 

 digital counter . Readout is provided directly in meters 

 and ambiguities are resolved in terms of 100, 1000, and 

 10, 000 meters. In the A pattern one scale graduation 

 represents 1 meter of range and is readable to one -half 

 a graduation. 



(13) Auxiliary readout: digital display available (see below 

 MRC/12). 



(14) Integral voice transmit and receive facilities are sup- 

 plied at the master and remote stations and are used 

 as a functional part of the measurement process. 



(15) Auxiliary plotter: The Alpine Geophysical Corp. Model 

 429 Precision Remote Electrical Plotter may be used 

 and has a plotting accuracy of ± 5 feet at any range . 

 Unit consists of Apex Unit at head of two lead screw rods . 

 As the operator follows the target range the screw 

 length and thus the position of the Apex unit properly 

 follows and indicates the track of the vessel . Gear 



153 



Arthur ai.lLittlclnr. 



