How are headwind values indicated in the WDR performance set, and what does HW05 specify?

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How are headwind values indicated in the WDR performance set, and what does HW05 specify?

In the WDR performance set, headwind values are encoded as HW followed by two digits, with each increment representing 5 knots. The smallest headwind shown this way is 5 knots, written as HW05. So HW05 specifies a 5-knot headwind, and other values follow the same pattern (HW10 for 10 knots, HW15 for 15 knots, etc.). This is the best fit because it matches the two-digit, 5-knot step format and the minimum of 5 knots. The other patterns don’t fit: a single digit wouldn’t cover the full range; claiming a maximum of 5 knots contradicts the 5-knot steps; and using TW would denote tailwind, not headwind.

In the WDR performance set, headwind values are encoded as HW followed by two digits, with each increment representing 5 knots. The smallest headwind shown this way is 5 knots, written as HW05. So HW05 specifies a 5-knot headwind, and other values follow the same pattern (HW10 for 10 knots, HW15 for 15 knots, etc.).

This is the best fit because it matches the two-digit, 5-knot step format and the minimum of 5 knots. The other patterns don’t fit: a single digit wouldn’t cover the full range; claiming a maximum of 5 knots contradicts the 5-knot steps; and using TW would denote tailwind, not headwind.

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