Any radar experts?

I was wondering if a Microwave leak detector could be 'doctored' for
use as an 'S' band radar detector for use while cruising. They are
pretty sensitive but would possible need some type of antenna and also
I don't know if they could cover the actual band width used by
ships's radar. They would also need to set-up with an alarm.

For example, one I looked at for $49.oo

Sensitivity to a wide range of frequencies
Calibrated at 2.4 gigahertz, which is the operating frequency of
microwave ovens
Sensitivity down to 0.01mW/cm2 at 2450MHz.
Reads up to 9.99mW/cm2 in hundredths of mW/cm2.

What do you think?

Cheers, Jim