1) i) A sextant can be used to estimate the height of the landmark.
ii) A sextant can measure angles between objects for a position on a chart.
iii) A sextant can also be used to measure the lunar distance between the moon
and another celestial object.
2) A space shuttle is better than a rocket because space shuttle is reusable.
3) Agriculture, soil, forestry, land and water resources, minerals, ocean
development and management of droughts and floods.
4) i) Exploration
ii) International Space Station