Which measurement error increases significantly during high ship roll when utilizing a sextant?

💡 Explanation

When high ship roll occurs, the sextant's frame of reference oscillates which creates large variations, making consistent vertical angle measurements extremely difficult due to exceeding marked arc. Therefore, vertical angle error is increased, rather than index/parallax/dip which are affected by other means.

• Which outcome occurred when the chinampa system experienced increased salinity in pre-colonial Mesoamerica maize cultivation?
• Which structural consequence arose when differential settlement occurred beneath Mesopotamian ziggurats constructed on alluvial plains?
• Which limitation constrained accuracy of 18th C. maritime position fixes using sextants during heavy fog?
• Which optical effect, explained by Ibn al-Haytham, causes a mirage on hot desert surfaces?
• Which risk is amplified in ancient terrace irrigation systems due to gravity's influence on soil saturation?
• Which outcome resulted from the controlled flooding of chinampas agriculture by the Aztecs across the Valley of Mexico?