Trekka in which John Guzwell circumnavigated in the 1950's (at the time the smallest boat to circumnavigate) was a fin keel spade rudder design by Jack Laurent Giles. Both before, and not least, since thousands of spade rudders have circumnavigated, and I honestly believe Colin Archer and other naval architects of yore would have used spade rudders had the technology at the time permitted it.
I love old boats, but the bad copies of Colin Archer boats in GRP, Steel etc make me cringe especially when they're heavier than the originals.
Originally Posted by SloopJonB
Every boat I've owned has had a spade, on shafts or on pintles & gudgeons - I've never had a lick of trouble with any of them.
The boats I've sailed with attached rudders were all much harder to steer than the spades. I've never sailed a boat with a skeg hung rudder.
I do know that I prefer a tiller and I absolutely HATE hydraulic steering - lifeless & insensitive as well as prone to leaks. I can't imagine why anyone would install it if they had ANY other option.
A spade with a tiller is stone axe technology - just what you want for steering a boat IMHO.