Aircraft Info in Flight Tracker

When I mouse over an aircraft in the graphical flight tracker it displays 3 lines of data. The middle line contains a sequence of numbers. What is the significance of those numbers?

Altitude in thousands of feet (so to speak). Example 360 = 36000’ (FL360) then speed in knots.

The first number is altitude in hundreds of feet followed by a ^ or v if it’s climbing or descending; the second number is the groundspeed in knots.

Quoted for eternal shame. :slight_smile:

What? That airplane could be at 360,000 feet!

SON OF A %*&$(#!!!

No more drinking at lunch for me! (That’s my story and I am sticking to it)