What is correct about resection a only horizontal position c

What is correct about resection?

a) only horizontal position can be calculated

b) it requires repetition in direct and reverse positions

c) it requires a minimum of three visible know stations

d) it eliminates the need to sight the resected (occupied) station from a previous coordinated traverse station

Solution

(C) is correct

principle of plane resection method in plane table surveying is to locate the position of plane table by drawing resectors from already plotted points. in resection method to draw the resectors we need atleast three visible station