The Joanna C fishing vessel sank at about 6am on Saturday (November 21) with three crew members on board.
One of the men was found clinging to a lifebuoy and was rescued by Newhaven Coastguard. He was flown to hospital by air ambulance.
A search for the other two men continued until 11pm on Saturday when it was suspended.
It resumed on Sunday morning (November 22) and is still continuing. The parameters of the search have been extended to Beachy Head, in Eastbourne.
A GoFundMe page, set up on Saturday evening, has now raised £3,200.
A post on the page says: “The Joanna C is a 45ft scalloping vessel registered in Brixham. The names of those on the boat will not be released until the authorities have publicly named the three men.
“All three men have families who are now being comforted by those in the fishing community. We have set this charity page up to allow people to donate and help with the financial aspects of the incident today.
“We are also using this page to allow you to leave messages for the three families involved who will be comforted by your words and thoughts.”
If you would like to donate, please click here.
A large number of rescue units were involved in the search on Saturday, including Eastbourne and Newhaven RNLI lifeboats, two Coastguard rescue helicopters, the Coastguard fixed wing aircraft and Birling Gap and Beachy Head Coastguard Rescue Teams. Also helping with this search were 12 other vessels including many fishing vessels in the area which responded to the Coastguard broadcasts and have been helping with the search at sea.
Chris Thomas, Deputy Director of HM Coastguard said: “HM Coastguard’s National Maritime Operations Centre has coordinated a major rescue effort today (Saturday, November 21), with many units searching tirelessly since first light and finding one casualty who has been recovered safely to hospital.
“Sadly two other crewmen have not yet been found and all our thoughts are with their families and friends. It is testament to the local maritime community that HM Coastguard were so admirably supported throughout the day by nearby vessels and the local fishing communities who joined us in force and made strenuous efforts to locate their colleagues during the search. At one point, Coastguard coordinators described tracking 14 vessels covering the search plan area including the two RNLI all weather lifeboats at sea.”