Alderney's relief lifeboat was launched answering a mayday call from a boat in danger of being swept into rocks.
The Trent class Henry Hays Duckworth was launched just after 1100 BST on Wednesday after the call from the 26ft (8m) motor cruiser Syakotan.
The boat was running out of fuel and in danger of being swept into the overfalls between Burhou island and Les Casquets Lighthouse.
The lifeboat's crew established a tow and brought it safely to Braye Harbour.
The motor cruiser, which was tied up in Alderney by 1230 BST, had left Poole bound for St Malo in France.