Not all trailers are created equal. Different quality of materials, the amount of material, the level of workmanship, and other factors differentiate one trailer brand from another. Of course, different approaches in design and material can effectively serve the same need — the array of automobiles we choose to transport our boats from one location to another illustrates this principle. But boat trailers aren’t scrutinized and mandated as closely as automobiles. So how can you know for certain the trailer you’re thinking of buying is up to par?

To help remove the guesswork for consumers, the National Marine Manufacturers Association (NMMA) has devised a Trailer Certification Program. While not all trailer manufacturers choose to participate in this program, consumers can be sure that those that do participate meet certain basic standards of quality and safety.

The standard by which the NMMA certifies its trailers is based on established industry standards set forth by the Department of Transportation (DOT) and National Highway Traffic Safety Administration (NHTSA), as well as the even stricter standards published by the Society of Automotive Engineers (SAE). The NMMA hires third-party inspectors, who are educated and trained in accordance with NMMA’s stringent certification process, to evaluate each trailer a manufacturer offers. If certain components don’t measure up to the prescribed standard, the inspectors give compliance recommendations to the manufacturer, which is granted a 30-day response time. The trailer is then re-evaluated to make sure it complies and that the methods used to gain such compliance haven’t adversely affected the trailer’s integrity in another area. The process is repeated annually.

Items covered by the certification include ensuring an accurate Gross Vehicle Weight Rating (GVWR) and Gross Axle Weight Rating (GAWR), so you don’t have to guess what its weight-carrying capacity is. Important trailer components such as couplings, winches, brakes, lighting and safety chains are also tested as part of the certification process. Coupling and safety chains, for instance, are certified to be strong enough for the respective Towing Class the trailer falls into (there are four Towing Classes ranging from 2,000 pounds to more than 5,000 pounds) and must meet or exceed in strength the trailer’s GVWR.

It would be nearly impossible for a consumer to ascertain if a trailer meets all this criteria on their own. If, however, they see the trailer bears the NMMA certification plate, they can rest assured it meets the highest of safety standards. And the peace of mind it affords is priceless.