INSTRUMENTATION 



A) Angle and Dls 

 Measuring Ins 

 1. Angle measuring 



a. T-2 Theodolite 

 (R. Wild Company, 

 Switzerland) 



b. T-3 Theodolite 



2. Levels (wild 

 Models N-II and 

 N-III) 



b. Tellurometer 

 ( Telluraseter Ltd. 

 South Africa) 



B) Electronic Posi- 

 tioning Systems 

 (Navigational Aids) 

 1. Hyperbolic 

 Systems 

 a. Lorac (Long 

 range accuracy) A 



2. Ranging Systems 

 a. Shoran (Short 

 range navigation) 



b. LAMBDA (Deccs 

 Navigator Ltd. , 



Azimuths determined to 

 within 1 second of arc 



Distance of measuring line 

 10 to 12 nautical miles 



Angle read to 0.2 second 

 Distance of measuring line 

 25 to 30 nautical miles 



Angle read on horizontal 

 circle to 0.1 second 



Angle read on vertical 

 circle to 0.2 second 



MAXIMUM RANGE: 30 nautical 



MAXIMUM RANCE: 3° to - 

 Accuracy: 20 feet 



IGE (useful): Apfroxi- 

 ely POO nautical milei 

 iccuracy: 15 feet on 

 ese line, 1*00 feet at 



RANGE: Generally restrict- 

 ed to approximately line- 

 of -eight distances 



Accuracy: 30 to 50 feet 

 in 1*0 nautical miles 



RANGE: 250 nautical miles 

 Accuracy: 100 to UOO feet, 

 dependent on vhlch end 

 of the range is being 



Visual observations and 

 data recorded on standard 

 log format 



Same as above 



(Time is compared with 



recorded on paper strip 



Dial indicators 



The U. S. Navy 

 in any developt 

 part in callbra 



lydrographic Office does not i 

 nt oo positioning equipment, 

 ing and evaluating new syste 



tively participate 

 but generally takes 



E-10 



