PHI - Position and Homing Indicator: Difference between revisions

Flight departure from Innsbruck airport (LOWI rwy: 08) and arrival to Bergamo Orio (LIME rwy: 30) airport.

Flightgear's route manager is a good way to plan your route using the map to extract references and see the actual planned route.<br>Looking at the ''Route Manager'' table, it can be seen that there is always an angle (ODO) with respect to north and the length of the section to be covered. The last stretch is the one in sight of the airport and must be managed differently with the classic methods of instrumental or visual navigation.

* ''Manual'': the table is inserted manually.

* ''Route manager'': the data has been loaded from '''RM'''.

In reality the 5 columns corresponded to the programming of only 4 columns, the first was set manually by the pilot.

The [Auto push] button allows to obtain the automatic progression of the route, in reality it was manual, obviously you can decide the progression manually.<br> The next block is the insertion of the magnetic declination, also in this case it is automatic, at least that the pilot does not want to do it himself.<br>The ''Wind configuration'' is used to automatically enter the wind direction and speed, otherwise it must be entered manually with the appropriate PHI system gauge.<br>Finally there is the section ''doppler''which defines 4 possible ways of use:<br>OFF, Rec only (keeping the doppler ''warm'', but without signal emission, useful in the enemy area)<ref>In reality, the ''heating'' time of the PHI apparatus was fairly long, it could proceed for several minutes before the thermionic valves stabilized, in the simulation this time was reduced to a few tens of seconds in order not to bore the user.</ref>, ON (Operative), Test.<br>The selector ''sea / land'' allows you to adjust a filter that improves the Doppler's operability when you have to cross a stretch of sea.