X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 09 Jun 2007 15:42:27 -0400 Message-ID: X-Original-Return-Path: Received: from smtp117.sbc.mail.re3.yahoo.com ([66.196.96.90] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with SMTP id 2093509 for lml@lancaironline.net; Sat, 09 Jun 2007 13:16:13 -0400 Received-SPF: none receiver=logan.com; client-ip=66.196.96.90; envelope-from=elippse@sbcglobal.net Received: (qmail 98640 invoked from network); 9 Jun 2007 17:15:31 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=32k7djapvm5/BAb9oS3ICHgu3Yq4e2WMXjyBGd5BszL+mAWRZQJ3xxxp+6adDB/F7Lb2r4o3YkN+TUPCjsqa5R/8PAmsqLRS+qlDeAENrKdEWiQK6nkkXSjnLFDfInpPjcG0oKXb+oe4IqwOd/8l2z77uj48157E670QBd4cnBo= ; Received: from unknown (HELO Computerroom) (elippse@sbcglobal.net@75.15.155.79 with login) by smtp117.sbc.mail.re3.yahoo.com with SMTP; 9 Jun 2007 17:15:30 -0000 X-YMail-OSG: 63P1LSgVM1kuXJL9AYJGs6FgDR6AJXlFfJeUwJjXJue_TbyMs7mQHwbs.7eK2GzsZtSQuTd0NA-- X-Original-Message-ID: <000801c7aab9$c8841700$4f9b0f4b@Computerroom> From: "Paul Lipps" X-Original-To: "Marv Kaye" Subject: Safety X-Original-Date: Sat, 9 Jun 2007 10:15:28 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C7AA7F.1A45F7B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C7AA7F.1A45F7B0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable In the interests of safety, I've been scouring many aviation-related = publications for the definition of "mid" air. Is that at 18,000' where = the air density is 1/2 of sea level, or at the mid altitude of the = extremes of where aircraft normally operate, say mid-way between 50,000' = and sea-level, or 25,000'? or the mid-point of where non-oxygen equipped = aircraft usually operate, or 6250'? If any one out there knows, please = clue me in. I keep reading about all these collisions that occur at = mid-air, and would like to avoid that altitude if at all possible on my = flights! ------=_NextPart_000_0005_01C7AA7F.1A45F7B0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
In the interests of safety, I've been scouring = many=20 aviation-related publications for the definition of "mid" air. Is that = at=20 18,000' where the air density is 1/2 of sea level, or at the mid = altitude of the=20 extremes of where aircraft normally operate, say mid-way between 50,000' = and=20 sea-level, or 25,000'? or the mid-point of where non-oxygen equipped = aircraft=20 usually operate, or 6250'? If any one out there knows, please clue me = in. I keep=20 reading about all these collisions that occur at mid-air, and would like = to=20 avoid that altitude if at all possible on my=20 flights! 
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