Sea Sprite 23 #110 (20)
probably space limitations.
I know they used to build tall ships here in Southern NJ down in Cape May. They all got launched sideways as there was not enough room to launch them lengthwise into the creek.
The Mighty USS New Jersey was launched stern first from the Philadelphia Ship Yard.. she went right across the Delaware and got stuck in the mud on the Jersey Side.. and the Delaware is over a mile wide there