I like that 3000 years of shipbuilding history and we still don't have anything better than "nah, just chuck it in!".Found it amazing that they look both heavy on land and yet light at the same time looking at how they bounce on the water.Worked at Smith's dock Southbank in the 70s. loved launch day ,the speed a ship went, replaced by a gust of wind and rush of water and noise of drag chains. As an apprentice and tradesman, seen Manchester and clipper boats launched. Worked amongst legends . Moulded me with humour and character.Bless them all.