Both mainline and lateral launch camera systems typically include an integrated sonde (locating beacon) that emits a signal detectable from the surface with a locator. As the camera moves through the pipe, the operator can mark the depth and horizontal position of the line and any defects (e.g., collapsed sections, sags, or service taps).

This precise locating supports targeted repairs, minimizes excavation, and helps build accurate as‑built maps of the underground system.

Lateral launch inspection is a specialized form of CCTV where a small side‑launch camera is deployed from a mainline crawler into lateral pipes that branch off the main sewer. The main camera drives down the larger pipe, then a secondary camera “launches” into each service connection to inspect private laterals back toward homes or buildings. This allows detailed inspection of laterals for blockages, root intrusion, cross‑bores, and illicit connections without excavating yards, streets, or foundations.