The marina down at Birdham Pool on Chichester harbour has an interesting marine railway systems complete with turntable. The turntable allows boats to be moved to various "sidings" in the yard which radiate outwards or there are tracks which allow travel into the boat sheds.
At the other end the railway connects to the slipway for launch and recovery. Given the investment in concrete and steel the systems must date back to times when the cranes and travel lifts with which we are so familiar were not available. It's a lovely piece of industrial heritage.