There's good information available on the early 20th C concrete tugs built in Britain which that article glosses over. Three are visible near the mouths of vari

There's good information available on the early 20th C concrete tugs built in Britain which that article glosses over. Three are visible near the mouths of various Irish and English rivers. http://www.worldnavalships.com/forums/archive/index.php/t-14164.html http://www.worldnavalships.com/forums/archive/index.php/t-14...