Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Longitudemedium · 45s
Which instrument historically helped in determining longitude at sea?
TopicLongitude
Question Typemultiple choice
Difficultymedium
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
The marine chronometer allowed sailors to determine longitude by comparing time at a reference location to local time.
Final Answer: Option B - Chronometer