Call to HMCG – small boat, partially submerged, drifting east past NCI lookout. Bearing 190 degrees, approx 250m. Exmouth ILB tasked to recover casualty vessel. Casualty vessel continues at 190 degrees, drifting out to sea, distance now 400m. Radio call on Ch65 from ILB requesting update on vessel position. NCI advised that casualty position at 194 degrees from lookout. Exmouth ILB recovered casualty onto ILB and returned to RNLI Boat house.