RNLI Angle's all-weather lifeboat launched in the early hours of Sunday to a mayday from a yacht said to be drifting, without power, off the south Pembrokeshire coast.
The nine-metre yacht, with two people on board, was reported to be 18 miles south-east of the Turbot Bank.
The Tamar class lifeboat, Mark Mason was launched at 2.20 am and used her radar and direction finder to help locate the casualty.
Once on scene, at 3.23 am, the lifeboat found the yacht was making slow progress with her own engine. Because the casualty had no lighting, it was decided to tow her to Milford Haven, which was reached shortly before 7 am.
At the entrance to Milford Docks, the tow was released and the yacht made her own way alongside the pontoon. With the casualty secure, the lifeboat was released to return to her station, where she was rehoused 7.20 am.
It was fourth call-out in seven days for the all weather lifeboat.
On Friday, she was launched at 4.55 am to go to the aid of a 17.4m motor boat, which had machinery failure and needed assistance off Dale Shelf. There were three people on board.
The lifeboat reached the casualty in eight minutes and put two of her crew members on board to assess the yacht's condition. The casualty had suffered water ingress, which was under control, but while attempting to berth at Dale she had been hit by some machinery failure.
After an assessment, and due to the weather conditions, it was decided to escort the yacht to her berth at Neyland Marina, where she was safely secured. The lifeboat recovered her two crew members and left the marina at 6.11 am to return to her station.
Two days earlier, on the Wednesday (May 27), the lifeboat was launched at 11.43 am after a report that a 12m yacht, with one person on board, had fouled her rudder on fishing gear just south of Skomer Island.
Whilst en route it was reported that a nearby dive vessel had offered assistance to the casualty. The lifeboat reached the scene at 12.05 pm to find the divers had cleared the obstruction. With all the divers recovered by their vessel, the yacht continued her passage to Holyhead and the lifeboat returned to station to be rehoused at 12.45 pm.
On the Monday (May 25), the lifeboat launched at 5.58 pm to take over a tow of a seven-metre leisure fishing vessel, from Tenby's all-weather lifeboat, off Sheep Island, near the entrance to the Milford Haven Waterway.
The casualty was taken to Neyland Marina, where the workboat took over the tow to her berth. The lifeboat returned to her station at 7.44 pm.