In article ,
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

SOLAS says that a Operational Radar MUST be fitted and operational for
any SOLAS Required Vessel to leave Port. Also the Required Radar MUST
have ARRPA. Most SOLAS Required Vessels will have TWO compliant RADARs
fitted so that they can still leave Port with one Down, should Repairs
not be available in the last Port of Call. ALL US Flagged Vessels over
300GT are Classed as SOLAS Required Vessels, via Title 111, Part 11, of
the Communications Act of 1934, as amended. Vessels under 300GT have
different requirements, detrmined by Class and Operations, HOWEVER, if
the fall under the USCG Fishing Vessel Safety Act as amended, they are
required to have a working Radar when leaving Port. Most commercial
Vessels will have two Radars fitted, just to have a backup, and ARRPA is
NOT Required.

--
Bruce in alaska
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