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Garmin GTN 750 Tips & Tricks

ByHank Gibson June 8, 2018June 19, 2018

The Garmin GTN 750 is an awesome piece of equipment.  Garmin tried to make the user interface with the touch screen as simple as possible (though there still is a bit of a learning curve when moving up from a Garmin 530W).  Garmin also integrated several key features that the 530W did not have that makes flying with a Garmin GTN 750 in IFR all that much better.

The two features of the Garmin GTN 750 I want to focus on today are the “Load Airway” feature and the “Hold at Waypoint” feature.  If a pilot isn’t looking for these specifically, they can actually be a bit hard to find.  The “Load Airway” feature is especially handy when flying IFR long distances with several airways as part of the clearance.  Here’s how to utilize both.

Load Airway

1. On your flight plan page, insert the waypoint that you will be joining the airway, or, if your clearance was radar vectors to join an airway, then insert the waypoint on the airway that begins the leg you will be joining on.
2. Tap the waypoint you just inserted.
3. A menu will pop up.  Tap Load Airway.
4. Select the Airway you want from the next menu that pops up.
5. Then, a list of waypoints will display to exit the airway.  Select the waypoint where you will be exiting the airway.
   1. Note:  Garmin defaults to listing these waypoints alphabetically.  If you unselect the “Sort Alpha” option, it will sort the waypoints by direction and distance from the entry waypoint.  This is a little more practical, easier to work with, and how I recommend doing it.  This way you can either scroll up or down depending on the direction of travel on the airway and find your exit waypoint.
6. Tap Load.
7. The Airway and all the waypoints in between your entry and exit waypoints appear in your flight plan.
8. If you are getting vectors to join the airway, you’ll need to use the Activate Leg function to activate the leg you will be joining the airway on.
   1. On the Flight Plan page, tap the waypoint that ends the leg you want to activate.
   2. On the menu that pops up, tap Activate Leg.

Hold At Waypoint

The Garmin GTN 750 allows pilots to place a holding pattern at any waypoint that is in the Nav Database (or any user created waypoint).  Here’s how to do it.

1. On the Flight Plan page, tap the Waypoint that you want to hold at.
2. On the menu that pops up, tap Hold At Waypoint
3. On the next menu that pops up, input either the inbound or outbound course, right or left turns, leg time or distance, and the EFC time, then tap Load.
4. You will see the hold now as a Waypoint in your flight plan.

Once the hold is entered, the GPS will go into Suspend mode, suspending the Flight Plan Waypoint Sequencing.  Once you are ready to depart the hold, you will have to tap Unsuspend before crossing the holding point on the inbound leg, then the GPS will resume normal waypoint sequencing.

These are 2 of the really cool, gee-wiz features of the Garmin GTN 750.  Following the above steps will make IFR flying much easier for the pilot, as well as much more enjoyable!

Keeping Your Margin

ByPete Greenwald November 23, 2016December 6, 2016

Just south of the equator in the mountains of Papua, Indonesia on the island of New Guinea, pilots spend their days carrying food, building supplies, doctors, pigs, and passengers into some of the most remote and extreme airstrips on the planet. That’s where I fly.

Each morning I load my Cessna Grand Caravan with 2,600 lbs of (insert strange cargo here) and depart my home base of Wamena just after the sun sends its first rays of light across the waking skies above. I spend my day winding through narrow valleys and crossing high altitude mountain passes with building clouds and poor communication, only to land on short, narrow airstrips with steep slopes and little room for error. Most of these one-way in, one-way out runways require me to commit to landing well before touchdown due to terrain that is too close to allow for a safe go-around. Everything better be right when I cross that decision point or I could be in for some excitement.

The need to keep wide margins of safety might seem obvious in environments like mine, but that doesn’t make them any less important where you fly. You may be a new pilot or an old timer, but keeping your margin should always be on the top of your priority list.

Let’s unpack this further. Margin is not just maintaining the regulatory requirements for cloud clearances or minimum altitudes. It’s more than planning for an alternate airport or carrying the required fuel reserve. Margin is breathing room. It is that extra maneuvering room, the Plan C, the well thought out options that provide you multiple “outs” in any given situation. Margin is what gets you home when things take a turn for the worse.

Margin comes in all shapes and sizes. For myself it includes maintaining double my required turn radius in narrow valleys or choosing not to land when my groundspeed is just 1 knot too high at a short and slippery airstrip. For you, it could be determining a ceiling or visibility minimum requirement that is more conservative than the legal ones or setting a wind limitation that you know is reasonable. When it comes down to it, keeping your margin means you don’t push to the ragged edge of your skill or the aircraft’s capability.

Margin can also refer to your mental or emotional capacity. Are you mentally prepared to divert and miss that important event because the weather is getting bad? Are you ready to handle the disappointment of passengers when you arrive over your airstrip and choose not to land due to approaching rain or a factor that is difficult for a non-pilot to understand? Are you willing to cancel a flight on an important client because you are coming down with a cold or didn’t get adequate sleep? As the PIC of your flying machine, you alone are responsible for the safety of the aircraft and the people on board and those are the tough calls that only you can make.

Fatigue, overconfidence, and complacency are the biggest obstacles to keeping your margin. They are all very subtle dangers and you may be experiencing them without even recognizing it. Fatigue can slow down your thought process leaving you behind the plane and backed into a corner before you know it. Overconfidence might cause you to push weather or commit to a course of action that has no favorable alternatives. Complacency will lead you to believe that, because you have 2000 hours in a particular make and model, you don’t need to do a thorough preflight or complete the pre-landing checklist.

Regardless of experience level, operating environment, fancy avionics, and level of proficiency, margin is something that we all need plenty of. So as you go about your upcoming flights, be asking yourself what you can do to build in more margin. It just might be what gets you home.

Pete Greenwald is a transplant to Atlanta, Georgia who has fallen in love with all things Southern, including his wife, Ashley.  As a pilot and A&P with Mission Aviation Fellowship, he flies the Cessna Grand Caravan in Papua, Indonesia serving people who live in isolation. In his spare time he is on the hunt for the best burger around.

New Houston Airspace Procedures

ByHank Gibson May 29, 2014

If you are based in Houston, or heading into or out of the Houston airspace under IFR, have you updated your charts?  If not, you may hear a clearance stating: “N67889, cleared to Amarillo via the BORRN 1 Departure, CRGER Transition, Direct.  Climb via the departure, expect 8000 in 10 minutes.  Departure frequency 123.8, Squawk 3365.”  You manage to get the clearance written down, but have completely messed up the spelling of both BORRN and CRGER, so you have no idea where the intersections are.  After stumbling through a readback, you ask ground to spell the fixes for you.

Then, more bad news.  You haven’t updated your GPS cards yet, so the departure isn’t in your 430.  It’s an RNAV only departure, so you can’t fly it based on the NAV Radio.  You were planning on updating your iPad when you got to Amarillo, so you don’t have the departure on there, either.

This has probably already happened to a few people today already.

Houston airspace got a major overhaul today.  There are 20 new DPs and 29 new STARs guiding IFR traffic into and out of Houston airspace (including one named the DOOBI 1 Arrival, named after the Dooby Brothers band).

The FAA’s goal in all these changes, according to AOPA, is to “bring fuel efficiencies, time efficiencies, and reduce carbon emissions” (from Benet J. Wilson’s May 15th article on AOPA.com).  The FAA issued a NOTAM today valid until June 6th describing what routes for pilots to file.  The NOTAM also contains contingency plans for pilots flying without updated charts (like our example above).

Pilots should expect these wide scale procedure additions and changes to start showing up in other Class B airspace across the country.  As always, make sure those charts are updated, GPS databases are current, and you do some studying of your route before you file your flight plan.

Present Position Hold

ByHank Gibson February 1, 2015

When I was working on my instrument rating back in 2007, my instructor and I did a lot of unpublished holds.  In ground school, I heard a lot about holding for weather or holding due to a traffic delay.  At my first job, my chief flight instructor was also a Continental (now United) captain and he told me a lot about having to hold for weather going into different places.

I heard all this, but I figured it would never happen to me when I’m flying GA airplanes.

Boy was I wrong!

I was flying a Piper Malibu into Phoenix with two passengers for Super Bowl weekend and the weather was awful.  No thunderstorms, but moderate precipitation and low ceilings.  We were coming into Deer Valley (KDVT) on the north side of Phoenix and about an hour out, ATC advised me that arrivals into DVT were having to hold and to expect a delay.  The controller said the delay would be about 30 minutes, so by doing a quick calculation, I determined the delay would probably be all cleared up by the time I got in the area.  At the time, I didn’t know if the delay was due to weather or traffic congestion.

Twenty minutes later, the controller advised me that there was still a delay.  I queried what it was for and he informed me it was due to weather.  He asked me if I wanted to hold or divert.  I listened to the ATIS and heard the ceilings were variable from just below the minimums to just above.  I told him I would hold as the TAF I saw predicted the ceilings to go up.

“Malibu, hold present position, hold east, expect further clearance 2140 Zulu.”  Gulp.

At this point, my autopilot had gone out, it was turbulent and I was definitely in the soup.  This was going to be fun.

After recovering my wits, I read back the clearance, then set about setting up this hold without getting too far from my present position.  The Malibu I was flying had a Garmin 530 which I was using as my primary means of navigation.  I was on V190, but I didn’t have all the fixes in my flight plan.  What to do?  And what to do fast?

The 530 has a rarely used function called a User Waypoint.  It comes in handy in situations like these.  On the moving map, you can turn the cursor on, move the cursor to any point on the map, and, by pressing enter, create a User Waypoint.  This is what I did on V190.  After I created it, I had to go to my flight plan, find the right spot, and input the User Waypoint just like I would any fix.  Just a note here, when you create a User Waypoint, make sure you remember what you named it so you can find it again.

After I input the User Waypoint in the flight plan, I had to go back and activate the leg that the User Waypoint was the end point on.  Then, to make sure the flight plan didn’t go to the next waypoint once I crossed my User Waypoint, I had to press the OBS button on the 530 in order to put the GPS in suspend mode.

Keep in mind, my autopilot wasn’t working, so this involved a lot of multi-tasking!

That’s how to do a present position hold using the Garmin 530.  Got all that?  Here’s a concise review:

• Create a User Waypoint
  • Turn the cursor on by pressing the FMS knob
  • Move the cursor to the point where you want your User Waypoint
  • Press enter and name the User Waypoint
• Press the Flight Plan button
• Input the User Waypoint into your flight plan at the proper point
• Activate the leg that the User Waypoint is the end point on
• Finally, press the OBS button to put the GPS in suspend mode
• After you’re cleared onward, just press the OBS button again to take the GPS out of suspend mode