Which type of scanning is considered unsuitable for use as a tracking radar?

Single-lobe scanning is unsuitable for use as tracking radar because it typically lacks the ability to generate the necessary antenna patterns and angular resolution required for accurately tracking fast-moving targets. Tracking radars need to reliably detect and follow targets, often adapting to their movements in real time.

Single-lobe systems usually provide a broad, single beam of energy that can cover a large area, but this makes them less effective in precisely determining the location and movement of multiple or fast-moving objects. Effective tracking requires the radar to be able to focus and refine its beam on specific targets, making multi-lobe or continuous-lobe scanning options more favorable as they allow for better resolution and adaptability in tracking scenarios.

In summary, single-lobe scanning limits the radar's functionality in accurately following moving targets due to its narrower focus and inability to achieve the necessary resolution for effective target tracking.