Both lifeboats were launched after reports of a person was believed to have waded into the water sandown bay.
Arriving on-scene it was established that the person was safe and well at home, both boats returned to station.
The ALB was launched at 15:30 to assist a 28ft yacht that had suffered machinery failure half a mile SW of Horsesand Fort.
The casualty was located and towed back to Chichester Harbour and then handed over to Chichester Harbour Patrol who assisted it with berthing.
We returned to station at 17:51