Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: Notesfiles $Revision: 1.6.2.17 $; site uokvax.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!uokvax!emks From: emks@uokvax.UUCP Newsgroups: net.aviation Subject: IFF/SIF Modes Message-ID: <1200006@uokvax.UUCP> Date: Mon, 10-Dec-84 14:06:00 EST Article-I.D.: uokvax.1200006 Posted: Mon Dec 10 14:06:00 1984 Date-Received: Thu, 13-Dec-84 00:45:36 EST Lines: 6 Nf-ID: #N:uokvax:1200006:000:124 Nf-From: uokvax!emks Dec 10 13:06:00 1984 Is there a difference between IFF/SIF Mode 3 that does or does not report altitude? And what are modes 1 and 2? kurt