Hello, missashley!

Code:

B C
* - - → *
↑ /
| /
| / 2
|22*/
| /
| /
|/
*
A

In the right triangle, we have: .

Relative to the ship, he is walking 0.749 m/sec forward.

Since the ship is moving forward at 5 m/sec,

. . the man is moving forward at 5.749 m/sec (relative to the water).

(That's where they got that number.)

So relative to the water, his movement looks like this: Code:

5.749
* - - - - - *
| /
| /
1.854 | /
| /
|θ/
*

We have: .

Hence: .

Relative to the forward direction of the boat, his angle is about 17.9°.