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

Which tide phenomenon is described as higher tides during full and new moons because the Sun, Moon, and Earth are in alignment?

When Sun, Moon, and Earth line up, their gravitational forces pull in the same direction and reinforce each other, producing a larger tidal range. At new moon the Moon is between Earth and Sun, and at full moon the Sun and Moon are opposite each other relative to Earth; in both configurations the tides are amplified, giving higher high tides and lower low tides. This amplified range is called a Spring Tide. It’s not about the season—the name comes from the tide “springing forth” to a greater height. When the Moon is at quarter phases, the Sun and Moon pull at right angles, partially cancelling each other and causing a smaller tidal range (neap tides). The other terms don’t describe this alignment-driven amplification.

When Sun, Moon, and Earth line up, their gravitational forces pull in the same direction and reinforce each other, producing a larger tidal range. At new moon the Moon is between Earth and Sun, and at full moon the Sun and Moon are opposite each other relative to Earth; in both configurations the tides are amplified, giving higher high tides and lower low tides. This amplified range is called a Spring Tide. It’s not about the season—the name comes from the tide “springing forth” to a greater height. When the Moon is at quarter phases, the Sun and Moon pull at right angles, partially cancelling each other and causing a smaller tidal range (neap tides). The other terms don’t describe this alignment-driven amplification.