What should the settings be when operating on surfaces like snow or ice?

When operating on surfaces like snow or ice, the appropriate setting for the TO DATASET MENU should be to ENG. This setting ensures that the aircraft is configured for takeoff to account for reduced friction and increased risk of skidding on slippery surfaces. By selecting the ENG setting, pilots can utilize a takeoff configuration that is appropriate for the conditions, which may include adjustments to thrust levels, preventing potential engine stall, and optimizing performance during the critical phase of takeoff.

In contrast, the AUTO setting would not specifically tailor the aircraft parameters suitable for icy or snowy conditions, and an incorrect selection could lead to compromised performance. The A/I (Anti-Icing) systems being OFF would expose the aircraft to further risk, as ice accumulation can affect lift and control surfaces, while a MANUAL setting for A/I might not provide the automated protection that's crucial for these flight conditions. The ENG setting aligns operational safety with the specific demands posed by operating on low-friction surfaces.