Is it or Isn't it?

Some folks say this is a battleship.
Some say it was made to look like a battleship to confuse the enemy.
The reality is more likely to be a coincidence.

It is an island in the Forth called Inchmickery. It was fortified during WW1 as a defensive measure.

Here it is partially distorted by mirage/refraction through a temperature gradient above the water. Viewed from Pettycur.