Book title no #11

Searching for a title for this book scared me a bit. My youngest son, Cameron, is sailing in the Volvo Round the Word race and leg 2 is starting in Cape Town in a couple of hours. So I was looking up titles about ships marooned - the Somali pirates, (and they are a bad threat for these yachts now) and I was beginning to feel that I didn't want to look for any more bad titles when I came across Enid Blyton's Famous 5 books...
Cameron is sailing for the Chinese team Sanya and they had to pull out of the first leg after 20 hours sailing because their hull was holed ...
So, enjoy "Five go down to the sea" and please think of my boy now and then...