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**Worked example — can you fly?** - METAR: `SPECI KMDW 121856Z 32005KT 1 1/2SM RA OVC007 17/16 A2980 RMK RAB35` - Temperature / dewpoint: **17 / 16 °C** → spread **1 °C**. - Estimated cloud base: `1 × 400 = 400 ft AGL`. - **Part 107 rule:** must stay **500 ft below clouds** and **2 000 ft horizontally from clouds**. - With a 400 ft cloud base, there is **no altitude below the cloud that satisfies the 500 ft rule** — even ground-level is too close vertically (you'd need the cloud to be above 500 AGL to fly at the surface). - **Also note:** visibility `1 1/2SM` is below the Part 107 minimum of **3 SM**, and `RA` (rain) is present — additional reasons not to fly.

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