Final answer:
Turning off the A/SKID & N/W STRG switch disables the anti-skid braking system and nose wheel steering in aircrafts, potentially reducing braking effectiveness and making ground maneuvers more difficult.
Step-by-step explanation:
If the A/SKID & N/W STRG switch were selected to OFF, this would typically relate to disabling the automatic skid protection and nose wheel steering on an aircraft. The A/SKID refers to the anti-skid braking system, which prevents the wheels from locking up during braking, allowing for maximum braking efficiency without skidding. Turning this feature off could result in reduced braking effectiveness and an increased likelihood of skidding on the runway, particularly in wet or icy conditions. The N/W STRG stands for nose wheel steering, which is crucial for maneuvering the aircraft on the ground. Without it, pilots would have to rely solely on differential braking and thrust to steer the aircraft while taxiing, which can be significantly more challenging and less precise.