A trailer of a semi-trailer truck includes a cargo container having affixed at a height of approximately forty-six inches from a base of the cargo container a hole that is approximately two and one half inches in diameter. A fleet pan enclosure in a form of a housing encompassing a communications circuitry, a global positioning device and an ultrasound sensor projects into an interior cavity of the cargo container through the hole. The global positioning device provides an accurate reporting of a location of the semi-trailer truck to a central server. An antenna of a communication circuitry is fully encompassed within the housing. The location at which the housing is affixed provides for an effective measuring and reliable locating of a stored transport item inside the interior cavity of the cargo container through the hole.