If you are a keen sea swimmer on holiday, there is always a list of dangers to look out for: unpredictable currents, jellyfish, sea urchins and, at worst, sharks.  But few people point out one of the greatest dangers. Jet skis. On my recent swimming holiday in Croatia,(click here to read the article) there was one particular piece of coastline where we were told by our instructors to hug the shore, as jet skiers often broke all codes of conduct at this location. They watched us, and the water, like hawks, but luckily it was [...]