12. Terrain and Airspace¶
12.1. Horizontal Terrain¶
Prior to using the Horizontal Terrain feature you should check that your airspace display list is configured correctly. You will find this in Map View Options → Airspace. In general you will want CTA, CTR and PRD selected. This will result in the cleanest display and also show the most important airspace from the point of view of infringement. You should also ensure that you have the terrain data downloaded in Settings → Downloads.
The Terrain and Airspace display has two modes, Plan and Fly.
In Plan mode the terrain and airspace along the selected segment (a segment is defined as takeoff to landing) will be shown. You use this mode in conjunction with the map and by reference to the ground, to determine altitudes to avoid infringing airspace and terrain.
To enter Plan mode, tap on a track segment on the map (the magenta line). The selected track segment will turn yellow, and the terrain and airspace details will be displayed in the Terrain and Airspace viewer. In Image 12.1 we have selected the SPR to YMIA segment.
You can swipe your finger sideways to move between segments. The selected segment is reflected on the Map Page as a yellow track line. You can swipe your finger up and down to increase or decrease your altitude for that segment, the new altitude is then reflected on the Plan Sheet.
Double tap inside the Terrain and Airspace window and the mode will switch to an overview of all segments. You can still swipe your finger to change between segments and adjust altitudes in this view.
The wind (if wind is entered in the Plan Sheet) is depicted by wind arrows every 2000’. The arrows are red if the wind is a headwind and green if the wind is a tailwind. Wind barbs indicate wind speed with every full length barb representing 10 knots and the fractional barbs proportionately.
Flight levels are displayed across the entire width of the window. They are colour coded i.e. green if it conforms to the recommended hemispherical levels (for VFR or IFR) or orange otherwise.
When you are in Fly mode (no track segment selected) the display shows the terrain and airspace in front of you at a scalable range up to 80NM. Adjust the range by swiping left or right in the window.
The height of the highest point in front of the aircraft for the range shown is labelled. Your GPS altitude is shown at the top left of the display. Any ADs or ALAs in front of the aircraft are displayed along with their altitude and distance from the aircrafts track with an offset left or right.
If you tap somewhere within the display any airspace under the tap point will be displayed on the main map page and noted in the terrain/airspace display. For example, in Image 12.2 we can see ‘Adelaide CTA C3’ is highlighted on the map, and the corresponding tap point in the Terrain & Airspace viewer is denoted by an ‘X’.
12.2. Active Restricted Airspace System¶
The option to highlight active restricted areas is found in Map View Options → Airspace. When enabled, active restricted airspace is shaded red. The status of restricted airspace is determined by requesting the NAIPS Restricted Area Briefing. OzRunways will request the restricted area briefing every 10 minutes and update the red shading accordingly. (Your device requires an internet connection in order to request the NAIPS Restricted Area Briefing.)
Not all restricted areas appear in the NAIPS Restricted Area Briefing (e.g. TRAs from AIP SUP or NOTAMs). If an area appears deactivated, please check the status with ATC or NOTAM as applicable.
In some cases we may manually add temporary airspace overlays (from SUP or NOTAM) to the map. If activation times are clearly defined the area will be shaded red while active. If activation times aren’t defined we may permanently shade the area red to bring it to the attention of pilots. In all cases, please confirm the status of restricted airspace before entry.
Military CTRs (e.g. Townsville MIL CTR displayed in Image 12.3) are not restricted areas, and therefore do not appear in the restricted area briefing. We have shaded these areas blue to remind pilots to check the status of the Military CTR with ATC or other means as applicable.