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Aircraft Operations. Volume II - Construction of Visual and Instrument ...

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Appendix A to Chapter 1<br />

PARAMETERS FOR HOLDING AREA CONSTRUCTION<br />

The material in this attachment provides general information on some <strong>of</strong> the parameters used for holding area<br />

construction. Parameters for which information is provided are as follows:<br />

1. Turn parameters<br />

2. Accountable wind vs. altitude<br />

3. Temperature vs. altitude<br />

4. DME slant range vs. ground distance<br />

5. True airspeed (TAS) vs. indicated airspeed (IAS) <strong>and</strong> altitude<br />

6. Formulae for basic holding area parameter calculations.<br />

1. TURN PARAMETERS<br />

(See also Part I, Section 2, Chapter 3)<br />

Applicable turn parameters are given in Figures <strong>II</strong>-4-1-App A-1, <strong>II</strong>-4-1-App A-2 <strong>and</strong> <strong>II</strong>-4-1-App A-3.<br />

2. ACCOUNTABLE WIND VS. ALTITUDE<br />

The accountable omnidirectional wind speed given in Figure <strong>II</strong>-4-1-App A-4 for specified altitude is calculated<br />

according to the following formula:<br />

w = (12 h + 87) km/h, where h is in thous<strong>and</strong>s <strong>of</strong> metres,<br />

or<br />

w = (2 h + 47) kt, where h is in thous<strong>and</strong>s <strong>of</strong> feet.<br />

SeeFigure<strong>II</strong>-4-1-AppA-5.<br />

3. TEMPERATURE VS. ALTITUDE<br />

<strong>II</strong>-4-1-App A-1 23/11/06

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