In the new era of America's Cup racing where the demands on the crew are greater than ever before, even just getting from one side of the boat to the other has become a challenge.
Traversing the 14 metres between the two knife-like hulls at speed across a soft trampoline surface while the boat sails at speeds in excess of 40 knots is a skill in itself.
But given how technically difficult the boats are to sail, it is a skill that is often overlooked in discussions on the highly complex AC72 catamarans.
An incident on the Oracle Team USA boat before Sunday's opening races highlighted just how easy it is for sailors to topple off the boat. Oracle grinder Joe Newton took an unscheduled swim after losing his footing as he was crossing the boat, tumbling into the water.
The ungraceful fall generated plenty of light-hearted discussion on social media, mostly at Newton's expense. Twenty-four hours later the genial Australian still hadn't managed to come up with a good cover story.