ThomasP
Chief Master Sergeant
In 1941 Malaya, a serious radar net would only have been practical around the Singapore base itself, and maybe with a few of the newer & smaller semi-portable naval radar based sets set up as local search radar at some of the outlying bases/airfields. The outlying posts could have communicated by radio with Singapore, thereby allowing a bit of early warning at longer distances. Protecting the outlying bases/radars would have been a problem.