प्लेन टेबल सर्वेक्षण में निम्नलिखित में से किस उपकरण का उपयोग तब किया जाता है जब झुकी हुई दृष्टि (inclined sights) लेना आवश्यक हो, जिससे दृष्टि की सटीकता और सीमा दोनों बढ़ जाती है?

In survey work using a total station with reflector measurements, which of the following sequence of temporary adjustments must be performed at a station?

While carrying out a total station survey on one bank of a 250 m wide river, it is necessary to plot electric transmission posts on the opposite bank. No provision exists for crossing the river and the posts are inaccessible. In which mode should the survey work be done?