Thanks for that----Did'nt they launch the DD tanks at Omaha at 5000/6000 yards[despite the protests of the tank commanders], where as at Gold beach they launched at about 800 yards.?----I'm not nautical in any way but it strikes me as inherently more risky to launch further out because presumably the tides/winds are stronger and more unpredictable.[of course i may be missing the point of this thread altogether so,if i am, sorry!] All I have in front of me is Idlers document posted above. I'll not trust my memory of the second hand sources & wait until they can be pulled off the shelf again. From idler Utah: 3,000 yds, 1 foundered of 30 = 3% loss Omaha: 6,000 yds, 27 foundered of 29 = 93% loss Juno: A Sqn: 1,500-2,000 yds, 3 foundered of 10 = 30% loss “ “ B Sqn: 4,000 yds 5 foundered of 19 = 26% loss Sword: 5,000 yds 3 foundered of 34 = 9% loss The closest to Omaha is Sword in distance launched. 5000 vs 6000 yards. With one at 93% sunk and the other at 9% sunk there is not a clear corelation to distance. Maybe someone else can see it? My take is there must be other factors.