Lifeboat crews and a rescue helicopter were called out after a man overboard beacon was activated.
The alert was flagged to the coastguard shortly before 10am and RNLI Peterhead was scrambled.
A search and rescue helicopter from Inverness was sent to assist, along with the local coastguard rescue team from Peterhead.
The incident turned out to be a false alarm after the beacon was accidentally activated by a fisherman aboard a vessel.
A coastguard spokesman said the incident was an “honest mistake”, however, proved useful as it displayed that emergency kit was working as it should.
All crews stood down around 11.30am.