The article linked above describes how the effect can be used to make an object disappear.
I am looking into flat earther beliefs and stumbled upon one of them claiming that it is the mirage effect that causes a ship's hull to disappear before the sails.I reason that this can't be given that eventually, you can't see the whole ship and this happens all the time, regardless of conditions. But I would still like to know whether the mirage effect could possibly cause the hull to disappear before the sails. I tried coming up with scenarios when this could happen, but I do not think any of them are practical.
Any illustrations will be helpful.