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The “Mercedes Benz” Technique for Holding Entry

LT. LT. LT. LT. RT. RT. RT. RT. 225 °. 135 °. HDG Bug 090 °. HDG Bug 090 °. The “Mercedes Benz” Technique for Holding Entry. Uses familiar “70 ° Technique”, but applies it to outbound heading vs inbound course Allows pilot to visualize entry using HSI vs mental math!

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The “Mercedes Benz” Technique for Holding Entry

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  1. LT LT LT LT RT RT RT RT 225° 135° HDG Bug 090° HDG Bug 090° The “Mercedes Benz” Technique for Holding Entry • Uses familiar “70° Technique”, but applies it to outboundheading vs inbound course • Allows pilot to visualize entry using HSI vs mental math! • Easy turn direction decision after last-minute adjustments to fix-to-fix Key to using this technique is visualizing the “Mercedes Benz” symbol on the HSI using the 90° indexes to create 3 quadrants. These quadrants determine turn direction when reaching the holding fix. The first quadrant will always be left turns; the next will always be right turns; the lower quadrant will always be direction of holding. Since direction of holding can only be left or right, that quadrant can be dissolved into the appropriate left or right quadrant. LT RT 20° 20° DH 70° 70° For a standard, right-hand holding pattern   B • The first step is to proceed directly to the holding fix. • Your aircraft heading is read under the lubber line at • the top of the HSI. • Place your heading bug on the outbound • heading—this is where you will be turning to • once crossing the fix. • Your turn direction is determined by which quadrant • your heading bug falls into when crossing the fix. A R090° Holding course 270°  C Example A: Acft heading: 135° Turn direction: LEFT to parallel Example B: Acft heading: 225° Turn direction: RIGHT Example C: Acft heading: 360° Turn direction: RIGHT 360° HDG Bug 090° downloaded from www.accessibleaviation.com

  2. RT LT For teardrop entries, you must determine if you are “conveniently aligned” with your selected teardrop course. AFMAN 11-217 gives us plenty of discretion to determine if you are conveniently aligned, but a basic guide is 45°. This means if your aircraft heading is within 45° of the selected teardrop course, you may elect to teardrop. Using our Mercedes Benz setup, you can quickly determine if you are within 45° of a maximum 45° teardrop course. Keeping your heading bug set on the standard outbound heading (the reciprocal of the inbound course), look at the upper 90° segments of your HSI, if your heading bug falls in the left 90° quadrant (for left-hand patterns) or in the right 90° quadrant (for right-hand patterns), you are conveniently aligned. Now that you’ve determined that you are conveniently aligned and are going to teardrop, reposition your heading bug for the selected teardrop course and turn to it (use course guidance, if available) when crossing the fix. LT RT Conveniently aligned for Right-hand holding pattern Conveniently aligned for Left-hand holding pattern Keep in mind that the 45° teardrop displacement doesn’t always apply. Holding entries to procedure turns are limited to offsets up to 30°, while ICAO holding dictates a fixed 30° teardrop offset. In these cases, simply find your desired teardrop course and see if your present heading is within 45° (or whatever you use to determine “conveniently aligned”) of it. downloaded from www.accessibleaviation.com

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