Edinburgh Inspiring Capital is racing towards Cape Town on the third race of the year-long challenge, which was won yesterday by the Gold Coast Australia crew.
Edinburgh skipper Gordon Reid said a rope or fishing net appeared to have caught around the boat’s rudder and would need to be freed.
He said: “In a marina it’s an easy job but in 20 knots of breeze on big ocean swell, swimming three metres under a 40-tonne boat is no walk in the park so we’re waiting until conditions are more favourable.”