NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Fatal interaction between yacht and ferry.
From: Bill B
Date: 2007 May 09, 14:12 -0400
From: Bill B
Date: 2007 May 09, 14:12 -0400
> I'm guessing that the beamwidth (radians) is on the order of 1 over the > width of the reflector expressed in wavelengths. So at X band (3 cm > wavelength), a reflector 30 cm aross will have a beamwidth of roughly > 1/10 radian, or 6 degrees. A bit of a stretch. but I'll go with the notion radar has been around long enough to qualify as "traditional navigation" so a topic for prolonged technical discussion. Radio even longer, thanks to Russian Alexander Popov refining the work of James Maxwell and Heinrich Hertz. (Credit to Alex for pointing this and revisionist history out to me.) My question stands. You can see the craft--why not radio it??? Bill --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
