Which three patterns are commonly used in building searches by MWD teams?

• A. Grid, Linear, Sector
• B. Grid, Circular, Sector
• C. Linear, Sector, Spiral
• D. Grid, Linear, Circular

Answer: (A)

Building searches by MWD teams rely on structured patterns that maximize coverage and maintain control of the dog. The three patterns you’ll see most are grid, linear, and sector. A grid search sweeps the area in perpendicular lanes, creating overlapping passes so scent gaps are unlikely. A linear search moves along straight lines—usually down corridors or along walls—so every foot of a hallway is checked and the dog can progress steadily. A sector search focuses on sweeping radial angles from a central point, which is especially useful when the suspected source is near a doorway or room and you want to quickly narrow down the area of interest. Using these patterns together lets you efficiently cover open spaces, thoroughly check long passages, and quickly home in on a potential odor source.