Douglas lifeboat was called into action last night after reports someone had fallen into the sea from Douglas Promenade.
The boat, along with coastguards, searched from the Palace Hotel to Derby Castle but found nobody.
Just minutes after the search was called off, the RNLI crew was called back into action - when a lone yachtsman got into difficulties 10 miles east of Douglas.
His vessel had to be towed into port after he fell and injured his shoulder.
Larger number of western homes to be without water
Do you know this man?
Tributes paid to legendary TT team founder
Muddy disgusting, says board after toilet sink blocked
Warning after email scammers impersonate Douglas vicar
Former builder's workshop could become two-storey family home
Urgent Keys question on bus strikes
MHK wants answers on unclaimed benefits cash