CLIA places are available at the two events at West Wittering, West Sussex on September 14, 9.30am: and at Formby Freshfield, Lancashire September 17, 10.15am.
Andy Harmer, CLIA UK and Ireland director, said: 'Working to maintain clean oceans and beaches is crucial.
'No single industry relies more on the splendour of our planet’s oceans and seas, nor the pristine beauty of the world’s harbours and seaside communities than the cruise industry.
'We are delighted to be joining The Great British Beach Clean as part of our ongoing sustainability work.'
The Great British Beach Clean is the biggest beach clean and survey in the UK.
Almost 7,000 people took part in the events in September 2017 and removed 255,209 pieces of litter from 339 beaches.
The Maritime Conservation Society has been recording this information for more than 25 years and lobbying governments to stop items getting there in the first place.
To take part in these events CLIA members are able to register via cruiseexperts.org