If it looks like a DUKW, Walks like a DUKW, Quacks like a DUKW

[gordon]

The hull design was by Rod Stephens of Sparkman and Stephens, and the vehicle was really very seaworthy - at least compared to other amphibians.

I've seen film of early DUKWs on surf test at Cape Cod or thereabouts going off the beach against, 10ft, 20ft, and 30 ft surf, just to put that in context the surf was as high as the vehicle was long.

The 'surf' board on the front was no such thing, but correctly deployed it made sure that nose went up, rather than down, when it hit a big wave - particularly valuable in 30ft surf I'd think.
Probably the most seaworthy of any amphibian ever made ?
Gordon