Which tide type has moderate tides during 1st and 3rd quarter moons because Sun and Moon are at right angles?

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 type has moderate tides during 1st and 3rd quarter moons because Sun and Moon are at right angles?

Explanation:
Tides are driven by the gravitational forces of the Moon and the Sun. When their pulls align, as at new or full moon, their effects reinforce each other and produce the largest tides—this is a spring tide. When the Sun and Moon are at right angles to each other, as seen during the 1st and 3rd quarter moons, their bulges partially cancel out. The result is a smaller tidal range, with high tides not as high and low tides not as low. That’s the neap tide, described here as moderate tides during the quarter moons because Sun and Moon are at right angles. The other terms don’t describe this geometry-driven reduction in tidal range.

Tides are driven by the gravitational forces of the Moon and the Sun. When their pulls align, as at new or full moon, their effects reinforce each other and produce the largest tides—this is a spring tide. When the Sun and Moon are at right angles to each other, as seen during the 1st and 3rd quarter moons, their bulges partially cancel out. The result is a smaller tidal range, with high tides not as high and low tides not as low. That’s the neap tide, described here as moderate tides during the quarter moons because Sun and Moon are at right angles. The other terms don’t describe this geometry-driven reduction in tidal range.

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