Right look at ship the size of sunny?
Maybe 50 meters Stack the 20 ships on top of each other and boom all of onigashima is covered
Now compare that to a Marine Battleship like 10 times as big as Sunny
	
	
		
		
	
	
	
	
		
		
	
	
This little ship in the arrow is Sunny
The Part is only 1/10th of Iceberg if even that