When operating an electric pallet jack before entering a trailer that is not attached to a tractor always make sure?

When operating an electric pallet jack before entering a trailer that is not attached to a tractor, always ensure that the trailer is properly secured and chocked to prevent it from moving. Check for adequate clearance and inspect the loading area for any hazards. Additionally, confirm that the trailer is stable and that the floor can support the weight of the pallet jack and its load. Safety protocols should always be followed to prevent accidents.