Radar underwater

On of the things not mentioned as "blocking radar" in the other posts is

WATER. More than a couple of feet and the radio waves are absored by the

water. Any vehicle using a radar under water would only heat the water.
(Microwaves folks:o)

A vehicle would need either optical, (blue-green laser, LiDAR etc. ) or
a dedicated sonar system to be able to "see" underwater. You might also
remember the show "SeaQuest DSV". The "Whisker" concept is something that
works. Small remotes giving you a longer base line for more accurate fixes and
also capable of carrying short range sensors, (the optical's above) close
enough to use while still extending your reach.

Randy

> On Fri, 25 Feb 2000 11:54:14 +1000, dadams@parracity.nsw.gov.au writes:

I believe that water absorbes radar quite well. One of the reasons modern subs
don't use it, except on the surface. In fact, water does a number of most EM
radiation. Radio doesn't work under water, etc.

G'day all.

Beth commented about sonar underwater (thermocline and other fun things). What
is the effects of Radar underwater?

Because SGII/DSII vehicals can operateate under or on water, would these
vehicles need dedicated sonar, or use their standard radar?

Darryl