Teams from Gosport and Fareham Inshore Rescue, Portsmouth Coastguard Rescue Team, Hillhead Coastguard Rescue Team, Queen's Harbour Master patrol vessel, and the coastguard rescue helicopter 175 were tasked to a man in the water at 1.45pm.
He was recovered from the water, having fallen from a tender.
The man was then passed into the care of an ambulance and the call was closed at 3.45pm.
Man dies after dog attack at Hillson Drive recreation ground in Fareham - owner is arrested
Fareham dog attack: Shrine set up in memory of man who died - named locally as Wiggy Symes
Heartfelt tributes paid to Wiggy Symes who died after Fareham dog attack
Thunderstorms yellow weather warning issued over Waterlooville, Fareham and parts of Hampshire by Met Office with chance of 'heavy rain'
Fareham dog walker and trainer Ian 'Wiggy' Symes thought to be killed by XL American Bully breed dog