Perspective Question: Why is the ship smaller when I get closer?

Hi Photography,I took the following photo of an arch and a ship: https://ift.tt/2o8Q9xx, I then moved in closer. Note how the fence where all the people are standing is right in front of me. However, despite being closer, the ship appears farther away: https://ift.tt/2ofQ63a was shot on an iPhone 6. Any ideas of what is going on? via /r/photography https://ift.tt/2mz0t1H