Final answer:
To secure a trailer without spring brakes, use wheel chocks to prevent it from rolling. Other securing methods like trailer locks, safety chains, and hitch locks do not replace the function of wheel chocks.
Step-by-step explanation:
If your trailer doesn’t have spring brakes, you should secure it by using wheel chocks. This is because wheel chocks are designed to prevent trailers from rolling when they are parked or stationed. Although the other options mentioned, such as a trailer lock, a safety chain, and a hitch lock, can provide additional security, they are not substitutes for wheel chocks for this particular function.
When a trailer is detached from a vehicle, it is critical to ensure it's safely immobilized. Even without spring brakes, positioning wheel chocks on each side of the tires can effectively prevent the trailer from moving. It is important to place the chocks snugly against the tire treads on a level surface and to ensure that the trailer is on stable ground to prevent any potential accidents or property damage.