•^- 



i-Xi— 



FIG 1(A) 



/ 



FIGS. I AND 2-SHIPBOARD THEODOLITE 



FIG I — (a) SKETCH OF OPTICAL SYSTEM; (B) FIELD Of VIEW UNDER DIFFERENT CON- 

 DITIONS 



FIG. 2 — (a) INSTRUMENT MOUNTED ON TRIPOD SHOWING COUNTERWEIGHT; (B) DETAILED 

 VIEW 



