Re:Cheaper Solutions (Score 2, Insightful)

Small correction: The surface radars in question actually use low frequency "radar waves" (no such thing, it's radio waves). Correctly: the system uses HF RF (HF band RF) which is a considerably lower frequency band than most modern radars operate at. At a guess these HF radar systems will suffer from problems of low resolution, making them less suitable for detection of small targets than an S or X band airborne system would.