The image depicts the structure of a home smoker and how it works. It is divided into three sections, labeled 1, 2, and 3 consecutively. The first section consists of fresh air and a lid; the second section contains a pipe, logs, and another lid; and the third section includes a box with smoked fish.
In general, the process is split into two steps: the first step takes place underground, while the second step occurs above ground.
In the first step, air is allowed to flow into the smoker by opening the lid. The flowing air is then directed into a chamber, where logs are loaded through the lid above. The flow of air and the burning logs start a fire, which creates smoke.
The smoke is then directed into another chamber above ground, where it fills the box containing fish and meat. These foods are then smoked by the incoming hot stream of smoke.