The sailor was injured aboard the yacht when it gybed.
The volunteer crew of Oban lifeboat Mora Edith MacDonald were called to assist a sailorinjured near the Isle of Easdale after suffering a dislocated shoulder and possible broken arm.
At 1.54pm on Tuesday August 28 Oban RNLI was asked by the UK Coastguard to assist a 12-metre yacht which had put out a distress call.