Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

Buy Ballot's Law states, in the Northern Hemisphere, if you stand with your back to the wind, where is the LP system?

Ballot's Law is a quick way to locate a low-pressure system from your wind observations in the Northern Hemisphere. In this hemisphere, a low-pressure system circulates counterclockwise. When you stand with the wind blowing from behind you (back to the wind), the rotation around the low places the center of the low to your left. So the LP system is on your left. This rule helps you estimate the rough location of a weather system using only wind direction, but you should also check barometer trends and visible weather cues for a fuller picture.

Ballot's Law is a quick way to locate a low-pressure system from your wind observations in the Northern Hemisphere. In this hemisphere, a low-pressure system circulates counterclockwise. When you stand with the wind blowing from behind you (back to the wind), the rotation around the low places the center of the low to your left. So the LP system is on your left. This rule helps you estimate the rough location of a weather system using only wind direction, but you should also check barometer trends and visible weather cues for a fuller picture.