Low water, shoaling or missing buoys can cause hazardous conditions along our nation’s waterways, putting ships and crews at risk. Even the smallest disruptions in navigation can have catastrophic consequences for supply chains and the movement of essential goods across the country, impacting the economy. To help mitigate these hazards and strengthen gaps in broadcast coverage, researchers at the U.S. Army Engineer Research and Development Center (ERDC) are using deployable mobile trailers to ensure that critical messages can be transmitted to vessel traffic.