Return-Path: Sender: (Marvin Kaye) To: lml Date: Sun, 01 Dec 2002 18:14:26 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d08.mx.aol.com ([205.188.157.40] verified) by logan.com (CommuniGate Pro SMTP 4.0.2) with ESMTP id 1892223 for lml@lancaironline.net; Sun, 01 Dec 2002 16:13:54 -0500 Received: from YoSamuel@aol.com by imo-d08.mx.aol.com (mail_out_v34.13.) id q.bb.2a4b1707 (3972) for ; Sun, 1 Dec 2002 16:13:46 -0500 (EST) From: YoSamuel@aol.com X-Original-Message-ID: X-Original-Date: Sun, 1 Dec 2002 16:13:45 EST Subject: Re: [LML] Re: Direct Routings X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_bb.2a4b1707.2b1bd589_boundary" X-Mailer: AOL 8.0 for Windows US sub 230 --part1_bb.2a4b1707.2b1bd589_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I believe ATC still uses heading and indicated speeds for comparison purposes. There are a large number of Aircraft out there that still don't have GPS. The most recent planes out of Boeing now have GPS. Most of the 75''s and 76's have RNAV using DME/DME with INS as a backup. Most of the 727's and DC-9's have neither GPS or RNAV. The controllers then must use the lowest common denominator, i.e. heading and IAS. Regards. Dave Link. --part1_bb.2a4b1707.2b1bd589_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit I believe ATC still uses heading and indicated speeds for comparison purposes. There are a large number of Aircraft out there that still don't have GPS. The most recent planes out of Boeing now have GPS. Most of the 75''s and 76's have RNAV using DME/DME with INS as a backup. Most of the 727's and DC-9's have neither GPS or RNAV. The controllers then must use the lowest common denominator, i.e. heading and IAS.

Regards. Dave Link. --part1_bb.2a4b1707.2b1bd589_boundary--