Look at the structure first — Page 455, Lesson 448

I want to walk you through the sunrise table. This is a real navigational tool, and I want you to understand exactly what it's giving you, because you'll use it to plan flights where daylight matters. Look at the structure first. The columns run across the top from November, through December, into January. And the rows are latitude, from N72 at the top, all the way down through N60, N50, N20, N10, the equator at 0, and down to S10 and S20 at the bottom. So the table is set up as a grid: you pick your latitude on the left, you pick your date across the top, and where they meet, you read a time. Now, what is that time? It's the time of sunrise, given in hours and minutes. And here's the critical thing about this table: the times are in UTC — Universal Time Coordinated. That's the standard time reference for aviation, the time at the Greenwich meridian. So when you read a sunrise time from this table, you are reading the moment the sun's upper limb appears above the horizon, expressed as UTC. Let me show you how to read one specific value, so you see the pattern. Take latitude N60. Follow across the row for the dates. On the 19th of November, the sunrise is at 08:07. On the 22nd, it's 08:14. On the 25th, 08:21. On the 28th, 08:28. Then into December: the 1st gives 08:34, the 4th gives 08:40, the 7th gives 08:45, the 10th gives 08:50, the 13th gives 08:54, the 16th gives 08:58, the 19th gives 09:00, the 22nd gives 09:02, the 25th gives 09:03, the 28th gives 09:03, the 31st gives 09:03, and into January the 3rd gives 09:01. Do you see what's happening there? At N60, the sunrise time gets later and later through November and December, peaks right around the 25th to the 28th at 09:03, and then starts getting earlier again in January. That's the seasonal swing — the sun rises later as you approach the winter solstice, then the trend reverses. Now look at the higher latitudes, and you'll see something even more dramatic. At N72, and at N70, and at N68, and at N66, you'll notice many of the cells are blank — there's no time entered. That's not a printing error. That's because at those high latitudes, during this part of the year, the sun never rises at all. It's the polar night. The sun stays below the horizon for the whole 24-hour day, so there is no sunrise time to record. The table only fills in values for the days when the sun actually does come up. Now compare that with the low latitudes. Look at the equator, the 0 row. The times hover right around 05:44 to 06:01 — very little variation across the whole period. And at S10 and S20, the southern latitudes, you'll see the times actually get slightly earlier as you move through December. That's the opposite of the northern hemisphere — in the southern summer, the sun rises earlier. So the table is telling you the full story of the seasons across both hemispheres. One more thing to notice: the times are given to the nearest minute, and the table is laid out so that each column is a specific date. When you're planning, you interpolate between the latitudes and between the dates to get the exact sunrise for your position and your day. But the fundamental read is always the same: latitude on the left, date across the top, sunrise time in UTC where they intersect. That's the sunrise table. It's your reference for when daylight begins at any latitude and date in this window, and it's built on the same principle you'll see in the sunset table — the geometry of the Earth's tilt and your position on the globe.