NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Fatal interaction betweeu yacht and ferry.
From: Paul Hirose
Date: 2007 May 08, 16:42 -0700
From: Paul Hirose
Date: 2007 May 08, 16:42 -0700
glapook@PACBELL.NET wrote: > > I don't think most sailors realize how much size matters when it comes > to radar reflectors and may be tempted to "just get the slightly > smaller one." Since the echo varies with the fourth power of the size > a small change in size will make a large increase in echo strength. > Changing the size by 19% changes the echo by a factor of two since > 1.19 is the fourth root of two. On the other hand, isn't it true that detection range varies with the fourth root of the radar cross section? If so, the detection range of the reflector alone would be proportional to the linear size of the reflector. -- I block messages that contain attachments or HTML. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---