Both Eastbourne lifeboats were launched after reports a sports boat collided with Eastbourne pier.
Members of the public contacted Dover Coastguard when they saw the small boat in difficulty around the pier.
Some reports said the vessel was being swept uncontrollably under the pier and had made contact with the structure.
The RNLI's inshore and all weather lifeboats were launched after the lack of communication from the vessel in danger.
The lifeboat safely located the boat and towed the boat to Sovereign Harbour.
More top news
Friday afternoon's forecast for the east of the region
Friday afternoon's forecast for the west of the region
Two men have been jailed for more than four years each after attempting to smuggle 18 Albanian immigrants into the UK.