Update to the update
How to find the Brown Pearl, in style
- Get ye an aircraft that flies a mile to the second exactly (trust me on this);
- Take ye off from Wright;
- Once in the air, turn around till ye bear a hundred and eighty degrees (due south, for the land-lubbers among ye);
- As you fly over the spawn point, turn 66.6 degrees to starboard;
- Fly as the crow flies, for 66.6 seconds;
- When ye see the message about having made a grave mistake, make ye speed 666 times two in miles per hour, and look to the right of ye.
I left the game running and went away, and when I came back my airplane was being shot at by an insanely fast-moving galleon with unlimited missiles. I've tried to discover how I triggered it, but haven't had any luck so far.
Credit to @CaptainCommunist for finding the answer, your method works. More photos below.