Introduction. Acmenav is a flight planning and preparation system for the Psion Series 3 pocket computer. However, unlike similar systems that already exist for this machine, Acmenav doesn't require comparatively gargantuan amounts of memory; it will run in just over 20k. Consequently, owners of the 128K model Series 3 should not be disadvantaged by the small amount of memory their machines possess. Purists may argue against the way I have achieved such modest memory requirements: all that loading and unloading of modules reduces the speed etc, however, I think that you will agree that there is barely a perceptible performance loss. Acmenav is the result of several years programming on many different portable computers by a UK private pilot and was originally written for the Psion Organiser II. However, previous versions weren't released for the simple reason that I had no way of distributing them satisfactorily. This is no longer the case as I now have regular access to CIS. For the foreseeable future Acmenav will be updated annually and during the intervening periods as and when necessary. I will only update the CIS version of Acmenav; consequently, I cannot guarantee how current copies obtained from other sources are. The database files will not be updated throughout the year; this is the responsibility of the individual user and will only be updated by me annually. Acmenav users in the US may feel that they are at a disadvantage since this system comes complete with a comprehensive UK database and several of the options are of unique use to UK pilots. If any American pilots can suggest suitable and useful improvements for their own brand of flying, I will be quite prepared to produce an American version. However, a US database will have to be entirely home grown as I have no access to accurate American flying data. There are many improvements already on my shopping list for the next major release; please see appendix C for details. Disclaimer. The author of this software makes no guarantee that it will behave as described in this manual. It is the responsibility of the individual user to satisfy his or herself that the system works as described. The author will not accept any responsibility for any death, injury, damage or airspace infringement that may occur as a result of the use of Acmenav; nothing should preclude the application of common sense and good airmanship in the preparation and execution of a flight plan. 1. Installation. 1.1 Introduction. During these installation instructions, and throughout the entire manual, it is assumed that you have a working knowledge of the directory and sub-directory hierarchal structure of the Series 3 filing system. If you do not possess such knowledge please refer to your user guide and acquire it before starting to use or install Acmenav . 1.2 Directories. It is advisable to run Acmenav from a flash solid state disk because these are a very robust, reliable, non-volatile storage medium. The disk that you intend to store Acmenav on should contain at least the following four directories: \dat\ \opo\ \opd\ \app\ If your disk does not already contain these directories create them now. 1.3 Sub-directories and files. 1.3.1 Introduction. Inside both the \dat\ and \opo\ directories create a sub-directory called Acmenav. A list of all the files that you should have is contained in appendix B; please ensure that all the listed files are present before trying to install or use Acmenav. 1.3.2 \dat\acmenav\ All the files with the extension .odb should be placed Inside the \dat\acmenav sub-directory. 1.3.3 \opo\acmenav\ All the files with the extension .opo should be placed Inside the \opo\acmenav sub-directory. 1.3.4 \app\ The file entitled Acmenav.app should be placed in this directory. 1.3.5 \opd\ The file entitled Acmenav.pic should be placed in this directory. 1.3.6 Completing the installation. Once all the files have been placed in their appropriate directories or sub-directories, install the Acmenav icon in the system screen using the "install application" option in the "applications" menu. You may also wish at this stage to assign a hot key sequence to Acmenav so that you can jump into it whilst running another application. 1.4 Moving the files around. All the files with the extension .opo and .odb .fpl and .log can be placed on any storage device (m, a or b) providing that they are placed in a sub-directory called Acmenav; however, it is not advisable to split up the files onto several disks as it can get quite difficult remembering which files are where and ensuring the correct disks are always plugged into your machine!