Garmin G1000 Flashcards
How do you shoot an approach using VNAV on the Garmin G-1000?
- Confirm or see altitude constraints in the flight plan.
- Set altitude in the altitude preselect. The altitude you set in blue must be lower than the VNAV altitude. If not, when you press the VNAV button, nothing will happen. For an approach, put in the altitude for the FAF. (With some other systems, you can put in the MDA, if it’s a non-precision approach, which essentially turns a non-precision approach into a precision-like approach).
- Nav
- VNAV.
- Your only job will be to manage the power during step downs.
- If flying an ILS, it will switch to green needles and change the nav frequency automatically. However, you still need to hit the approach button before the final approach point.
When using VNAV with the Garmin G-1000, how low can you go on an approach?
For an ILS, LPV, or LNAV with advisory vertical guidance, VNAV will take you to the fix before the FAF.
If the approach has no vertical guidance, such as a VOR or LOC, VNAV can take you to the FAF.
How do you use the Direct To button using VNAV?
Say you are going direct to the airport.
- Hit the Direct To button.
- Enter the destination - in this case, the airport.
- Enter an altitude. You would enter 1,000 for a piston aircraft or 1,500 for a turbine aircraft to be at traffic pattern altitude.
- Enter an offset. -3 will get you to TPA three miles before you reach the airport.
- Activate it.
After activating the Direct To function, you can edit the VNAV settings on the MFD flight plan page.
Use the VNV PROF softkey to put your cursor in the CURRENT VNV PROFILE box.
You can then change the VS TGT to your desired rate of descent, or you could change the FPA / flight path angle to a different descent angle.
For a piston plane, you might set the VS TGT to use a 500 fpm descent.
How do you use VNAV to descend to the airport for a visual approach when you have a flight plan set up in the Garmin G-1000?
- Highlight the altitude column for your destination and press the ATK (along track) OFST (offset) soft key. This allows you to make your descent to a point along your track (ATK) that is before the airport instead of reaching your desired altitude directly over the field.
- Enter your traffic pattern altitude and -3 or however many miles you want to reach that altitude before you get to the airport.
- If you want to edit the VNV PROFILE, press the VNV PROF soft key.
What should you remember when using VNAV in the mountains or when you have obstacles such as high towers near your destination?
VNAV does not take into consideration terrain or obstacles.
If you plan a descent through a mountain, you will not receive any warnings.
So keep terrain in mind when planning descent, especially for airports that are in valleys.
For these airports, you may need to use a steeper descent angle than normal.
How do you know if vertical navigation is armed?
Check your autopilot status bar at the top of the PFD.
What is the 5 minute rule when using VNAV with the first generation Garmin G-1000?
In order for the autopilot to capture the vertical path (VPTH), the VNAV has to be armed/acknowledged within 5 minutes prior to reaching the TOD. This can be accomplished by pressing the VNV key on the autopilot or by adjusting the altitude bug.
BEST PRACTICES TIP - It’s best to wait for the 1-minute “Vertical Track” alert, which occurs 1 minute before reaching the TOD.
Arming VNV once is all that is required for multiple subsequent step-downs. (If you press VNV again, you may actually un-arm it).
Can you arm VNAV and GP at the same time on the Garmin G-1000?
Yes, as long as you know when to expect each one.
VNAV typically works up to one fix prior to FAF. Then the glide path becomes active.
If applicable, the GP is armed by pressing the APR key on the autopilot.
What do VPTH and GP stand for, and what is the difference?
VPTH is Vertical Path. It will always take you to the lowest of the altitudes you have set in the altitude select window or the VNAV target altitude window.
GP is glide path. It will not respect any altitude restrictions and will take you to the ground.
What does the annunciation ALTV mean when using VNAV with the Garmin G-1000?
The annunciation ALTV means that the VNV Target Altitude is to be captured.
ALT is for Altitude
V is for VNAV
ALTV is armed automatically after the VNV Key is pressed and there is another VNV Target Altitude is to be intercepted before the Selected Altitude.
VNV Target Altitudes are shown in the active flight plan or vertical direct-to, and can be entered manually or loaded from a database.
What does the VNV Direct soft key do at the bottom of the FPL / flight plan page?
The VNV Direct soft key is just a simple way of moving the TOD up to your current position. It’s useful when ATC says to start your descent NOW, and you still want a reference. VNAV direct does the same thing for you vertically that the direct-key does for you laterally.
BEST PRACTICES TIP: Once you activate VNAV-Direct, the TOD will be at your position almost immediately, so select your altitude and arm VNAV before pressing the enter key. This way you won’t fly past the vertical path before the autopilot can capture it.
If you do accidentally fly through it, re-activate VNAV-Direct and it will move the TOD to your current position once again.
After you arm VNAV in the Garmin G-1000 and get close to the TOD, you’ll see indications that look like a glide path show up in magenta next to the airspeed indicator. What is this?
The Vertical Deviation Indicator / VDI.
Once you have reached the TOD, the VDI should stay centered throughout the descent.
When you’re using the Garmin G-1000, and after you’ve armed VNAV, what should you see in the window at the top of the PFD?
You will still be in Altitude Hold mode, so that will be in the left on green. VPTH / vertical path will be showing in white on the right.
Once you’ve reached the TOD, VPTH will move to the left and change to green.
If there is another VNAV altitude to be targeted before you get to the altitude set with the altitude preselect and shown with the altitude bug, the right side will say ALTV, which means there is another altitude target VNAV to be captured before you reach your bottom altitude.
If you have step downs and have to level off, the indications will switch back to what they were before - with ALT hold mode in the left in green and VPTH mode in white on the right.
If you don’t have step downs, the right side that is armed will say ALTS for Altitude Select / Hold mode instead of ALTV (Altitude VNAV mode).
