On Wed, 07 Jan 2009 08:46:13 -0600, Geoff Schultz
wrote:

Wayne.B wrote in
news
On Wed, 07 Jan 2009 06:48:33 -0600, Geoff Schultz
wrote:

So am I correct in stating that the S-band radar is typically used for
long distance and X-band for shorter distance? Is it also valid to
assume that if a ship has S-band that it will also have X-band?

Basically correct. The National Weather Service uses S Band radar for
weather tracking out to 200 miles or so using high power and large
antennas.

I'm not sure that it is safe to assume that large ships will always be
using an X Band radar if that is what you are driving at.

What are the radar requirements for ships up to 300 tons and over 300 tons?

-- Geoff
www.GeoffSchultz.org

http://www.ybw.com/pbo/pdfs/radar_reflectors.pdf
See section 1.1, in particular. (SOLAS)