For what purpose would a learner use upper-hand and forearm techniques?

Learners use upper-hand and forearm techniques primarily to aid in traveling and recognizing obstacles at both torso levels. These techniques are designed to enhance the user's ability to navigate their environment safely and effectively, ensuring that they can detect obstacles not just at head height, but also those that may arise at torso level.

By employing upper-hand techniques, a learner can explore their surroundings better, utilizing their hands for tactile feedback and heightening their awareness of various obstacles. This dual-level approach is particularly beneficial in crowded or complex environments where objects can vary significantly in height. It allows for a comprehensive understanding of spatial orientation and potential hazards.

This choice recognizes the importance of using a combination of body movements and sensory input to enhance mobility and travel efficiency, which is critical for individuals who are visually impaired or blind.