सर्वेक्षक कम्पास (Surveyor's compass) पर किया जाने वाला निम्नलिखित में से कौन सा एक अस्थायी समायोजन (temporary adjustment) नहीं है?

In surveying, an angle made by a survey line with the prolongation of the preceding line is known as a/an:

Which of the following methods in surveying is commonly referred to as the Loose Needle Method?