__What it tells you__ is that when the first relative bearing is equal to 30°, and the second is
equal to 60°, 0.875 multiplied by the distance run is equal to the distance from the object when abeam. It also tells you
that 0.5 multiplied by the time run is equal to the time until the object is abeam, and distance run multiplied by 0.5 is
equal to the distance until the object is abeam.

__This works because__ the triangle between the first and second positions and the object is isoceles,
meaning that two of the angles are the same and two of the legs are the same length. Therefore distance run is equal to distance
to the object at the second position. The pythagorean theorum and sine functions can also show us that in a 30°-60°**-**90°
triangle, like the one formed between the second position, the position when the object is abeam, and the object, the shorter
leg is half the length of the hypotenuse, and the longer leg is 0.875 (or 7/8) the length of the hypotenuse.

sin 60° = opposite / hypotenuse

sin 60° = 0.875

0.875 = opposite / hypotenuse

0.875 x hypotenuse = opposite

cos 60° = adjacent / hypotenuse

cos 60° = 0.5

0.5 = adjacent / hypotenuse

0.5 x hypotenuse = adjacent